Think about the different people and things in your life that you help protect. There might be times when you're called upon to protect your family or friends. Sometimes, you need to protect items that are special to you, like your favorite toy. If something bad were to happen to any of these things, you'd step up and protect them. Why? Because they're important to you! The environment and the living things within the environment are also worthy of protection because they play important roles in your life and your world!
i don't what you mean by, fragment-punctuated-correctly, but it is not "let's" because let's mean "let is" so that sentence would be punctuated incorrectly
Because in ancient times people would make stories to help them more understand the world around them. I would say A. Science helps us understand nature :D
