geography: Teh central part of Bejing?

Questions

The octopus has a funnel-shaped opening beneath its head through which hit secretes a black fluid when threatened. What is this funnel called??

What do the group of mammals known as monotremes do??

What mammal always bears 4 identical young of the same sex??

_____would bring wisdom and intelligence??

Which insect has a hearing organ in one of it's wing veins which enables it to hear the shriek of bats??