Depend on what you mean by what kind of competition, if you talk about competition for food, some bird population may be getting smaller and have a hard time to reproduce because they can't get enough food for themselves.
C - both A and B. The digestive system does those two.
1 to 2% of the entire population
Is an example of natural history of syphilis in hopes of justifying treatment programs for blacks
Psychoanalysis is the answer.
