12. A food supply for the developing plant embryo is called the

it takes hundreds of years to become stable.

if you have another question lmk.

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.

i think its white blood cells

i hope this

your answer is going to be physical weathering