Which scenario is the best example of competition between individuals and species

Answer 1

Two species of birds competing for the same food source in the same habitat.

Answer 2

1.Hermit crabs compete for shells to live in
2. some are better adapted
3.drought
4.they have no predators, so they spread rapidly

I got 100%

Answer 3

The person on top of me is correct

1.Hermit crabs compete for shells to live in
2. some are better adapted
3.drought
4.they have no predators, so they spread rapidly