Pls help me with this will mark brainliest

Which conditions are necessary for natural selection to occur? select all of the answers that apply. a. inheritable adaptations vary among individuals. b. the population size is increasing. c. more individuals are born than can survive. d. fitness varies among individuals. e. the environment changes suddenly and drastically.

Body systems are not completely independent they integrate and work together describe one example of the integration between body systems

Asolution containing hci would likely have