Answer:
Light energy or chemical energy
Explanation:
Light energy or chemical energy support the whole pyramid. Without it, plants/producers would die (they wouldn't be able to photosynthesize or chemo synthesize), leaving the first level consumers with no food, thus leaving the second level consumers with no food, and so on.
Hope this helped!
The correct answer would be D. DNA evidence showing it was more closely related to mammals than to other vertebrates <span />
Bottleneck Effect where there is a steady decrease over time
