What is the name that is given to a symbiotic relationship in which both species benefit?

A. Commensalism
B. Mutualism
C. Parasitism
D. Predation

Could someone me with number one you

4. how does a phospholipid behave in water? the phosphate head does not mix with water; the fatty acid tails do. the phosphate head and the fatty acid tails mix with water. the phosphate head and the fatty acid tails do not mix with water. the phosphate head mixes with water; the fatty acid tails do not.

Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this