From the list provided the eco-friendly activities are recycling materials, growing trees, burying organic matter and using fewer disposables. Recycling materials ensures that less refuse is available to become trash. Planting trees prevents and remedies soil erosion. Using fewer disposables ensures that less refuse enters the environment. Filling landfills, cutting trees and burning fossil fuels are all non eco-friendly practices.
Theory because a theory is a well substantiated explanation of how a particular phenomenon works based on the set of facts which had been repeatedly confirmed through observations and experiments. A scientific theory gives reliable account of a phenomenon.
<span>positive self talk is the best source of internal motivation.</span>
I would say c is the answer
