Which are required for natural selection to occur

Here's one way to follow the scientific method. place the missing steps in the correct position in the process.

New york city has 2,181 inhabitants per square mile. the state of alaska has 1.03 inhabitants per square mile. ecologists would say alaska has a low exponential growth population density birth rate carrying capacity

The buildup of sediments where a river empties into a slow-moving or nonmoving body of water is known as a/an