The endangered largest living lemur idri idri is inhabitant of

Consider the following statements $\left(1\right)$-$\left(4\right)$ each with one or two blanks.

(1) Bears go into ___ $\left(\mathrm{a}\right)$ ___  during winter to ___ $\left(\mathrm{b}\right)$ ___ cold weather

(2) A conical age pyramid with a broad base represents ___ $\left(\mathrm{c}\right)$ ___ human population

(3) A wasp pollinating a fig flower is an example of ___$\left(\mathrm{d}\right)$ ___

(4) An area with high levels of species richness is known as ___ $\left(\mathrm{e}\right)$ ___

Which one of the following options give the correct fill ups the respective blank numbers from $\left(\mathrm{a}\right)$ to $\left(\mathrm{e}\right)$ in the statements?