Which ecosystem is least adaptable for growing crops?

a.
sahara
b.
rain forest
c.
savanna
d.
sahel

The answer is: A. Sahara

Crops need several crucial things in order to live, including water, nutritious soil , and sunlight.  

Sahara wouldn't be able to provide enough water ( since the high temperature make water evaporated quickly) and nutritious soil for the plants,  (Sahara is consist of non-nutritious sands).

You can still grow quite a lot of crops on Rain forest, Savanna , and Sahel. Tropical fruits grow really well in rain forest, sahel is good for peanuts and peas , and Savanna can be used to grow corns and millet.

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.