I’m pretty sure it’s the 2nd one :)
Got this from google, scientists count a species population by first knowing the population in a certain area or small geographical sample location then multiply the result by the total area.
I don't think so. if its too even and have no tilt, everything will be the same
A collision between two continental plates crunches and folds the rock at the boundary, lifting it up and leading to the formation of mountains and mountain ranges.