This is an example of secondary succession.
We know that before the presence of charred rocks, an ecosystem did exist before and that's why its an example of secondary succession.
<span>The feature of an experiment that is changed from one treatment to the next is referred as a variable. </span>
The correct option is C.
Specie specific signals are those signals which are limited to only one specie of animal. The specie usually use it to communicate with the members of the specie. Each signal normally have a specific meaning and will produce uniform response in its receivers.
Car A is the answer because that would have negative acceleration
