What material in the soil serves a similar role to that of clay because of its ion exchange capacity, ability to store water, and ability to bind particles together?

humus

Explanation:

Humus

Humus is the amorphous organic matter in the soil .

It affects the bulk density of the soil and contributes in the retension of the nutrients and moisture of the soil .

It mostly contains organic matter  , and is naturally composed from dead and decaying plants and animals .

Humus is a dark color organic matter , and have many nutrients which nourishes and improves the heath of the soil .

what events in mexico's history might explain why the country continues to have difficulty improving social justice and economic opportunities for all people?