Answer:
A is the correct answer
Explanation:
the existed about 3.8to 4.0 billion years ago
This type of organism is called an autotroph.They are organisms capable of self-nourishment by using inorganic materials as a source of nutrients and using photosynthesis or chemosynthesis as a source of energy
Answer:
C) When common lands are protected, land degradation slowly disappears.
Explanation:
The object is balanced against standard units of mass
