Which one of the following population interactions is widely used in medical science for the production of antibiotics?

Small fish get stuck near the bottom of a shark and derives its nutrition from it. This kind of association is called as

There is more competition for survival between

Describe mutualism in detail.

Define the following terms and give one example for each:

$(a)$ Commensalism

$(b)$ Parasitism

$(c)$ Camouflage

$(d)$ Mutualism

$(e)$ Interspecific competition