Natural disasters can have positive effects on an ecosystem. select the best answer from the choices provided t f

The correct option is true.

Explanation:

Natural disasters are events like earthquakes, floods etc which occur naturally and usually have devastating effects on ecosystems. But natural disasters can somehow benefit an ecosystem in many ways. For example; floods can cause the soil to be flooded with nutrients which they were lacking before. Hence, this will increase the crop yield for that area. Floods can also cause an area of a lake to have more nutrients which will help in the survival of aquatic organisms and can provide better nutrient containing fishes for humans.

Volcanoes can cause the precious minerals present in the Earth to come to the surface. Hence, raising the economy for a country.

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.