Answer:
There are four principles at work in evolution—variation, inheritance, selection and time. These are considered the components of the evolutionary mechanism of natural selection.
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Answer is It can be used by scientists everywhere and everything.
I am pretty sure it is B, my second choice is D, its definitely not A or C.
I hope this helps you:)
Answer: The first law of thermodynamics establishes that energy cannot be created neither destroyed.
Explanation:
So the grasshopers eat the grass to gain energy and then the birds eat the grasshopers to gain energy as well so by doing that they are just passing the energy to one another to power muscles and other body parts which follows the laws of thermodynamics that energy is not created but transfered from one system to another.
Hope this helps ! -Enrique, Biology Major :)
