What is the difference between phytoplankton and zooplankton

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

the supermassive black hole is in the middle of the galaxy.

brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

explanation:

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.