<span>C.Enough supporting evidence has accumulated for it to be called a theory.
Hope this helps!</span>
is d trust me natural selection is a change over time wich is what the guppy is going
When any animal becomes extinct reguardless of its position in the food chain there is a trickling affect to all other links, creating overpopulation and over kill of other species now that the habitat balance has become skewed. Having one species become extinct will cause further issues a for other species down the road.
The unit of time based on the revolution of the Earth around the Sun is called a Year.
The unit of time based on the Earth spinning around completely once on its own axis is called a Day.