The association between a suckerfish $(Remora)$ and a shark is an example of:

Choose the correct statements regarding population interactions between two species.
$A$. In both parasitism and commensalism,only one species benefits and the other species is harmed.
$B$. Both species benefit in mutualism.
$C$. Both species benefit in commensalism.
$D$. In parasitism,only one species benefits and the other species is harmed.
$E$. In amensalism,one species is harmed and the other is unaffected.

Gause's principle of competitive exclusion states that

What happens when the number of organisms increases in a specific area?

Which of the following interactions is represented by the $(-, +)$ relationship between species $A$ and species $B$ respectively?

American lakes visiting flamingoes and resident fishes compete for their common food $A$ in the lake. Resources $B$ limiting for competition to occur; in interference competition,the feeding efficiency of one species might be $C$ due to the interfering and inhibitory presence of the other species,even if resources (food and space) are abundant. Choose the correct option for $A$,$B$,and $C$.