Which is the change in size of a group of organisms of the same species over time?

This is a time line from 685 to 978

The soviet union beat the us to the first successful launch, with the october 4, 1957, orbiting of sputnik 1, and later beat the us to have the first human in earth orbit, yuri gagarin, on april 12, 1961. the "race" peaked with the july 20, 1969, us landing of the first humans on the moon with apollo 11

A.true this might be wrong, but if it's not wrong, mark me brainliest.