B, it is an aggressive behavior for male antelopes to compete for mates in the breeding season, and B is wrong;
C, animals can help plants pollinate, so that these plants can reproduce successfully, which is a * * * biological relationship between different China creatures, C error;
D, between the male penguin and the female penguin in the breeding season, it is a mutual aid relationship that is conducive to breeding offspring. D is correct.
Therefore, choose: d.