Available options:
(a). plants.
(b). flowers.
(c). Oak.
(d). animals.
(e). parasites.
(f). humans.
(g). amoeba.
(h). Trees.

Fact 1: All plants have a characteristic life cycle that includes alternation of generations. Fact 2: Plant and animal life cycles are detailed, including birth, growth, reproduction, and death. Given the two facts above, all what have a characteristic life cycle that are detailed with birth, growth, reproduction, death?
Answer:
(a).