(L2) Bacteria live in or among the root cells of many plants. The plants provide a home and nutrients to the bacteria. In return, the bacteria help the host plants absorb inorganic nitrogen from the soil to help make proteins. What type of symbiotic relationship do the
bacteria and plants have?
A. parasitism
B. commensalism
C. competition
D. mutualism

I think mutualism but it could be wrong too plzzz help me give me brain list plz

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

here's your answer.