Their bone structure from fossils and their morphology
Scientists learn a few different things. Scientists learn new things very day.
they learn behavioral patterns of the animals.
Scientists can learn many things from fossils:What an ancient animal's bones looked likeWhat ancient plants looked likeHow an ancient animal's body might have lookedWhat kind of environment existed in that area millions of years agoHow animals and plants probably interacted millions of years ago
Their DNA
They don't, they guess.
Yes
A classification is important to scientists because it can help them classify living things( to help them sort things so there won't be a billion groups)!
so they can learn more things about it.
with technology
So that we can learn more about ancient earth.
There are a number of things that scientists study to learn about prehistory. This will include archaeological facts and fossil evidence which gives an explanation of how most things came into being.
Scientists study fossils, ancient tools, and DNA to learn more about early humans. By comparing and analyzing these sources of evidence, scientists can piece together information about the behavior, lifestyle, and relationships of our ancestors.