What determines whether an atom will form a bond with another atom

answer; i believe the correct answer is (sporophyte);

science-ocean floors and habitats study guide by volleyballqueen3817 a major advance in ocean-floor mapping. list four sections of the ocean floor. algae that use sunlight to produce their own food through photosynthesis. all of the feeding relationships that exist in a habitat. drying out, predators, find food.

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.