Answer: Model
Explanation:
Models are able to break down complex processes into the most important parts so that the process can be repeated over and over again with just those important parts.
Models are very important and useful to the advancement of life as we know it because they help us repeat processes that are needed to push development forward in just about every field and industry.
<span>Water is scarce because there are few lakes and rivers and many mountain ranges block rain from moving inland.</span>
Monongahela River, Ohio River, and Allegheny River.
