(a) different types of cells A, B and C (b) structure D
(c) the waxy, water-repellent layer E
(d) provide a stable heading for the above diagram​

not only is it colder, it also becomes darker, less salty, and more dense.

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation:

sex cells are usually half's then they find another half and make a fertilize egg