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Answer:
Gravity, also called gravitation, in mechanics, the universal force of attraction acting between all matter. ... On Earth all bodies have a weight, or downward force of gravity, proportional to their mass, which Earth's mass exerts on them. Gravity is measured by the acceleration that it gives to freely falling objects.
Answer:
Environmental protection is one of the basic prerequisites for the overall development of any country in the world. If economic growth and development are to be established, and there is no country in the world that does not want to do so, biodiversity must be contributed. As awareness of environmental protection is developed, human awareness is also developed about the need to preserve the environment by preventing adverse impacts on nature.