by gradually making up more available energy by using resources faster than they can be replaced by changing how matter cycles through an ecosystem by increasing the variety of ecosystems that are supported
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Census data show that the human population doubled from 2.65 billion in 1953 to 5.3 billion in 1990. If it continues to double at this rate, the human population could reach 10 billion by the year 2020. Which best explains how this rate of human growth can harm the environment on which humans depend?
Possibilities:
- by gradually making up more available energy
- by using resources faster than they can be replaced
- by changing how matter cycles through an ecosystem
- by increasing the variety of ecosystems that are supported

by using resources faster than they can be replaced