Ecosystem services question 9 options: are economically valuable services provided by natural systems contribute to keeping ecosystems productive are not necessary to sustainable systems are required to rebalance natural systems that we have disturbed are valuable to natural systems but not to human-created systems

Provides valuable facilities in economic filed through natural system

Explanation:

Ecosystem services are the facilities and benefit that is gained from natural ecosystem to humans.The major services provided by ecosystem is regulation of resources, provision, culture and supporting natural process.

These services are valuable to human and living organism in economic terms, spiritual terms and natural terms.Some examples of ecosystem are aquatic ecosystem, grassland ecosystem etc.

Other options are incorrect because ecosystem facilities does not majorly provide productivity, sustainability and re-balancing trait and it is important for human systems as well.

A) are economically valuable services provided by natural systems

Explanation: The ecosystem consist of both the biological and physical elements or components in our environment.

The ecosystem services can be Simply defined as the direct and indirect benefits humans get from the ecosystem which contributes to our survival, quality of life and general wellbeing. This services are essential to our daily lives,

It is categorised into four (4) services namely;

---Regulating services:- these are simply services that control natural processes . ( Water purification, pollination, waste management, soil formation etc.)

---Provisioning services; these are the products and goods gotten from the ecosystem ( food, medicine, fibre, woods, fresh water etc)

---Supporting/Habitat services; these type of services maintain other ecosystem services ( habitat, soil nutrients etc)

Cultural services; these are the non material benefits from the ecosystem ( spirituality, inspiration, beliefs etc)

So ecosystem services are economically valuable services provided by natural systems.

marginal cost is a microeconomic measure that us to evaluate the extent to which the level of production of a good is sustainable in accounting, that is, to how many quantities the company plans to profit from the production of the good.

the concept of marginal cost is simple, it means the cost of producing one more item. for example, in the case of pies, the marginal cost is the cost of producing one more pie than those that have already been produced.

it is important to understand that productive activity influences marginal cost. the marginal cost of some goods can be very high, while others may be insignificant. for example, the marginal cost of producing an extra plane is very high. already the marginal cost of a water company to provide 1l more water is derisory.

in the case of pies, the cost involves the inputs, the labor and the fixed cost, which involves the fixed space of the bakery. the level of production initially has the marginal cost decreasing because there is space and manpower available. however, to produce more you have to hire more workers and buy more inputs. if physical space is limited, workers will conflict with places, inputs and their productivity will decrease, meaning there is an optimum point of production for each level of space and manpower. from this point on, the productivity of the workers will be getting smaller because of lack of space, so that the marginal cost of producing one more pie will be increasing. so, although you have not posted the chart, but if you have the answer, you can see that my explanation goes according to the marginal cost curve that will increase from the 4th pie, answer (c).