Because it’s time consuming and money consuming to observe from space so models are required
The answer is dusk and dawn.
Crepuscular animals are active during twilight (latin crepusculum). Twilight is a period after dawn and before dusk, so crepuscular animals want to avoid dusk and dawn. Animals' activity in different periods during the day depends on temperature or other biotic factors. It also depends on predators' activities or local competition.
<span>A. The African plate is breaking apart to form two separate plates.</span>
The way that I know it is that cells make up tissue, tissue makes up organs, and organs make up organ systems.
