Answer:
C. The importance of environmentally friendly products
Step-by-step explanation:
The given text is about the importance of environmentally friendly products. It tells us what they are, why we should use them, and what else they are called. This is why option C is the correct one.
Option A is incorrect because the text doesn't tell us why saving our planet is important. Using eco-friendly products could help us save it, but that isn't mentioned. Recycling is also important when it comes to this, but it isn't mentioned, either, which makes option B incorrect. The text doesn't tell us why companies make environmentally friendly products, but what type of chemicals they use while making them. This is why option D is also incorrect.