Answer:
1. Because its where we live and can survive
2. Because the planet gives us food and water (which other planets can't)
Sorry if these aren't good enough
Answer:
people depend on plants for food, clean water, air, fuel, clothing, and shelter.Humanity is totally dependant on Nature to survive.
animals also depend on plants, they make shelter and oxygen to live. Plants and Animals depend upon each other as mutual interdependence is must for their survival.