The central ,innermost or most essential part of something
Im unsure :( maybe try looking up a calorie calculator
The second thesis statement is perfect. It supports the claim and presents main idea.
Without plastic, we wouldn't have as much of an environmental problem as we have now. Even though plastic has a lot of negatives, it's also made our lives a lot easier over past years. ... Our cars would have been different since a lot of the materials used inside are made out of plastic.
