A school of anchovies or a gaggle of geese or even a pod of orca whales would be a population. A population refers to all members of the same species.
According to Cheshire Cat, March Hare is like the Hatter because
C. The March Hare is also mad.
Only the Hatter wore a hat. White
Rabbit is the other character to have a watch.
Alice is the one who fell down the rabbit hole.
Hope this helps.
I think it would be a because you don't use diagrams to show graphs because they are themselves a diagram