What is the position of heart valves when blood pressure is highest in the aorta?

compost can be added to topsoil as a:

pesticide

b.

i think the answer is g1

hope i

-lavira: )

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.