Answer:
picture one
it holds the cytoplasm and cell organelles inside it. acts as a contaniner allowing only certain substance to go out aand enter.
picture two
internal structure and shape
maintains and protects internal structure and shape of a cell
pict3
connection
aeorbic respiration occurs in the mitochondria
Variation and natural selection
An estuary is partly enclosed coastal body of water with one or more rivers flowing through it, and with a free connection to the open sea. it would be more of a collection. hope this help have a great day.