Which of the following is $NOT$ an adaptation for parasites?

The Monarch butterfly is not eaten by predators because of:

The sea anemone and the clown fish are an excellent example of which of the following?

In an association of two animal species,one is a termite which feeds on wood and the other is a protozoan $Trichonympha$ present in the gut of the termite. What type of association do they establish?

What is the primary role of predators in an ecosystem?

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: Abingdon tortoise in Galapagos islands became extinct within a decade after goats were introduced.
Reason $R$: Goats were more efficient at browsing than Abingdon tortoise.
In the light of the above statements, choose the most appropriate answer from the options given below: