Can someone explain what a dichotomous key is?

“Dichotomous” means divided into two parts, hence the dichotomous keys always present two choices based on the key characteristics of the organism in each step. By correctly selecting the right choice at each stage, the user will be able to identify the name of the organism at the end. The further you divide the key, the more you learn about the specimen you are trying to identify.

Explanation:

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~alex

a dichotomous key is a tool that allows the user to determine the identity of items in the natural world, such as trees, wildflowers, mammals, reptiles, rocks, and fish.

the speed increase from w to x due to increased gravity force

the speed decreases from x to y due to decrease in gravity

b. lithosphere, asthenosphere, mesosphere   is the answer most likely