The answer is <span>the number of DNA mutations in an organism is measured over time to determine how long it will take for a new species to evolve.</span>
Don't copy others. Come up with your own scenario.
The sudden change in climate is as a result of the interaction of the atmosphere and the lithosphere. The heavy rains at high altitude are as a result of relief rainfall. The mountain acts as a barrier, causing the air to rise. Once air rises it cools and condenses. Cloud formation often leads to precipitation on the windward side of the mountain.
It provided people with 1 of their most basic needs, a dependable supply of food