A) biotic; within
B) biotic; outside
C) abiotic; within
D) abiotic; outside

A) introducing wolves into an area affects the deer population.
B) building a dam affects plants and animal populations in an area.
C) human habitation has changed the population size of caribou in a decade.
D) acidification of the oceans affects aquatic and terrestrial organisms.

A) chicken instead of steak
B) steak instead of chicken
C) steak instead of vegetables
D) vegetables instead of steak