How do wind and water change rocks over time?

A) They add minerals to the rocks
B) They change the shape of the rocks
C) They increase the mass of the rocks
D) They build up the rocks with small sand particles

Legumes, a type of plant, require rhizobia, a type of soil bacteria, to survive since these organisms fix nitrogen during photosynthesis. rhizobia use the legumes for food. what would most likely happen to the legume population if rhizobia suddenly became extinct?

When listening the levels of orginization in orginisims from the smallest to most complex , which level is just below organs in complexity

How water is moving through the ecosystem ?