Fact 1: Mating is generally preceded by courtship. Fact 2: Courtship patterns vary with species. Given the two facts above, what patterns vary with species?

Pick your answer from:
i. h2o.
ii. mating.
iii. insects.
iv. humans.
v. the sun.
vi. Decibels.
vii. complex.
viii. colors.
The answer is:
ii.