Answer: Option (C)
Explanation: Non renewable resources refers to those resources that cannot be regenerated after being used. This are also known as the conventional energy resources. They are formed from the decay of ancient planta and animals that were buried millions of years ago. For example, coal, petroleum, oil and natural gas.
This <u>amount of this resources are present on the earth in a very fixed amount and have great economic significance</u>. Since it is present in a very small amount, so it must be use carefully and if possible should make minimum use of it.
In order to sustain this resources, alternate renewable resources are being used.
Thus, the correct answer is option (C).
Just took the test and figured out the answer was A. Hoped I helped you and everyone else reading this.
I think it's probably position
A)......they were introduced for biological control in waste treatment facilities and ponds but then they got out due to a major flood into the waterways and took over everything becoming the dominant species
