Which of the following is an example of parasitism?

A. Leeches consume blood of their host

B. Ticks that live on dogs

C. Aphid insects eat the sap of the host plant

D. All of the above

Answer: Option D

Solution(By Examveda Team)

All of the above are examples of parasitism.

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C. decrease in thickness of ozone layer in stratosphere

D. increase in the thickness of ozone layer in troposphere