Answer:
Predators are an important part of a healthy ecosystem. Predators remove vulnerable prey, such as the old, injured, sick, or very young, leaving more food for the survival and success of healthy prey animals. Also, by controlling the size of prey populations, predators help slow down the spread of disease.
The answer is to your question my friend is D.
Eugene is running and needs more energy. He drinks a sports drink with sugar, but that sugar needs to be converted to another form of chemical energy forhis leg muscles to be able to use it. The process that will convert the sugar to energy that his cells can use is cellular respiration
hope it helps