If there was more than one planet on each orbit, eventually they would collide with each other.
Answer:
Explanation:
Biodiversity valuation of each species of natural resource
A complete value representing contribution to the system, usage (economically or ecologically), even carbon stock. Do, or could, nature areas keep databases of this information about their species?
Pull factors are reasons why groups of people leave a particular place.
Holland is the answer to your question