What is a by-product of the photosynthetic light reaction?

This is so important ugh its 25 points

Which of the following is a true statement? a. individuals evolve to have adaptations. b. individuals have adaptations that can change over time. c. individuals have traits that may or may not make them successful at reproduction. d. populations cant evolve, only individual organisms.

This is the process of making a prediction based on the results of prior observations of similar events.