What causes the rainforest land is poor for farming?

One reason the rain forest soil is poor is that most of the nutrients are stored in the plants themselves. In any forest, dead organic matter falls to the ground, providing valuable nutrients for new growth. In cooler or drier climates, the nutrients build up in the soil.

Explanation:

iii. and iv. only is the right answer

c. seafloor spreading occurs.

d. crust becomes molten rock.

e. denser plates slide under lighter plates.