Competition, Social Hierarchy, and Territorial Imperative
Answer:inertia and gravity
Explanation:
The factors which keep the Earth revolving around the sun are the inertia and the gravity. These forces work together in order to keep the Earth and moon in their respective orbits.
Producers obtain energy from photosynthesis as they are the plants, bacteria, and algae that form the initial layer of energy transfer. Producers then transfer a percentage of energy to first tier consumers (herbivores/omnivores).
Answer:
1. Hydrogen, 2. A solar nebula collapsed and formed the sun, and 3. 450 B.C.
Explanation:
The USSR or Soviet Union.
