<span>Scientists choose where are units of time began and ended based on major changes in life forms at certain times</span>
Tectonic Plates<span>, Earthquakes, and </span>Volcanoes<span>. According to the theory of </span>plate tectonics, Earth is an active planet. Its surface is composed of many individualplates<span> that move and interact, constantly changing and reshaping Earth's outer layer.</span>Volcanoes<span> and earthquakes both result from the </span>movement<span> of </span>tectonic plates<span>.</span>
A. Add up individuals who came into the area because of reproduction or immigration
The choices for this question can be found elsewhere and as follows:
<span>A. drought
B. draft
C. heat wave
D. flood
</span>
The correct answer among the choices is option A. <span>An extended period of well below average rainfall is known as a drought. Drought is the lack of water for a period of time.</span>
