a decrease in the rate of soil erosion a decrease in the fertility of the topsoil an increase in the production of plants used for medicines an increase in the amount of oxygen produced in the atmosphere
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: As a result of rain forest deforestation, some organisms lose their habitats. Which is also an effect of rain forest deforestation?
Possibilities:
- a decrease in the rate of soil erosion
- a decrease in the fertility of the topsoil
- an increase in the production of plants used for medicines
- an increase in the amount of oxygen produced in the atmosphere

a decrease in the fertility of the topsoil