A koala
The Aztecs had no padded armor. The Spanish did along with guns. The Aztec didn't even have gunpowder.
The atomic radius decreases along a period. It is because of increasing effective nuclear charge along a period.
Yes electronegativity changes along a period. It increases along a period.
They do not get along because they are not the same type of animal
Fish.
The Squirrel?
Sloths are pesky. No one gets along with sloths.
People. oh, you meant animal animals? then... themselves.
A rabbit
dolphins
Yes, they can, so long as they have seen the parents of the two animals mating. This encourages them to copy what they see and get along with the other animal
Yes, because they get along great with any animal!