Living organisms are characterized by their ability to maintain a stable internal environment. In order to do this, organisms must be able to extract energy from food. are primarily responsible for this function.

When writing a sentence, you will have a main idea, and you may also have a subordinate idea, a clause that has less importance than the main idea. Subordinate ideas, sometimes called a subordinate clause or a dependent clause, can help you prove or establish the importance of the main idea in your sentence. Knowing how to identify a subordinate idea will help you strengthen your writing skills.