Answer: <u><em>D. An observation that has a number associated with it</em></u>
Explanation: The answer is D. An observation that has a number associated with it. I would explain further, but it is pretty self explanatory.
<em>Good luck!</em>
Answer:the chocolate is the answer
Explanation:
Answer:
Ecology is the study of how organisms interact with one another and with their physical environment.
