Read the following selection from the article. As life expands into its environment, it uses up sources of energy and matter. It also expels waste products, and these environmental changes lead to more evolution. Explorers should watch for this cyclical process. What does the word "cyclical" in the selection tell the reader? А The process is easy to control. B The process is always expanding. с The process requires a lot of energy The process repeats again and again. th​