Why do you think shifting cultivation though destructive is still practised in many parts of the world?

The need for new fertile land makes it a bait for communities that practice shifting cultivation to continue. Farming on the same soil for consecutuve number of years make sthe soil exploited of nutrients, therefore, since, this communities do not have mechanisms to restore fertility, or simply cannot afford, then they move to new fertile unexploited land.

Explanation:

Being a communal practice, shifting cultivation is part of the culture of groups that practice it, it is therefore inevitable for them to leave this practice that defines them.

Communal or tribal ownership of land also leads to the continued shifting cultivation since individuals have got no land of their own to maintain, and therefore, move from piece to piece over a period of time for bwtter fertile land.

a is the answer because it just is

levels of production can be increased by technology while holding labor and capital constant, because increased technology makes the production process more efficient. subsequently, the lras curve is almost a vertical line, that can shift to the right, with an increase in technology.

the relationship between the lras curve and the ppc is that both can make the economy could grow. the ppc achieves that when it shifts outward because of more resources or technological advances while the lras curve shifts if more resources are developed or if there are technological advances.

the lras curve is a vertical line at an output level that represents the number of goods and services a nation can produce over a sustained period using all of its productive resources as efficiently as possible with all of the current technology available to it.

the production possibilities frontier (ppf) is a graphical device that is used for economic analysis of production decisions because the ppf measures the maximum possible combinations of two goods that an economy is capable of producing with its currently available resources and technology.