Answer the following question: Fact 1: Erosion of soil has a negative impact on the environment. Fact 2: Desertification implies soil erosion. Given the two facts above, what has a negative impact on the environment?

Options are:
(i) deforestation;
(ii) deserts;
(iii) cigarettes;
(iv) desertification;
(v) humans disturb it;
(vi) environments;
(vii) weather;
(viii) harmful substances;
Answer:
(iv)