Which gives nourishment to embryo sac??
1) Tapetum
2) Endosperm
3) Thalamus
4)Nucellus​

4 Nucellus

Explanation:

if u think right then follow me

the function of the protein macromolecule is to move things in and out of the cell and transport other molecules in the body. there are many functions of proteins. they are the basic building blocks of living things and are responsible for the growth and repair of body cells and tissues.

explanation:

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."