Question

exam lesson name: introduction to agriculture science
exam number: 700792rr
exam guidelines
exam instructions
question 20 of 20 :
select the best answer for the question.

1. desertification is caused by a combination of converging problems, including:

○ a. famine, starvation, and biodiversity loss.
○ b. urban sprawl, pesticide contamination, and natural cycles.
○ c. contamination of irrigation water and natural cycles.
○ d. overgrazing, deforestation, drought, and climate change.
□ mark for review (will be highlighted on the review page)

Explanation:

To determine the cause of desertification, we analyze each option:

• Option A: Famine, starvation, and biodiversity loss are consequences of desertification, not causes.
• Option B: Urban sprawl and pesticide contamination are not primary causes of desertification. Natural cycles alone don't cause desertification in the context of converging problems here.
• Option C: Contamination of irrigation water is not a main cause of desertification, and natural cycles are not the key converging factor for desertification as per the question's context.
• Option D: Overgrazing (removes vegetation), deforestation (reduces plant cover), drought (lack of water), and climate change (alters weather patterns) are all known factors that contribute to the process of desertification by degrading land quality and reducing its ability to support vegetation.

Answer:

D. overgrazing, deforestation, drought, and climate change