The questions in this section address a number of important reading and writing skills. Each question includes one or more passages, which may include a table or graph. Read each passage and question carefully, and then choose the best answer to the question based on the passage(s).
Question 1
The following text is adapted from a 2022 study on indigenous agricultural practices in West Africa.
For centuries, Ghanaian farmers in the forest-savanna transition zone have practiced "compound farming" — cultivating a diverse mix of crops in small plots surrounding their homes. Researchers studying soil health in the region found that compound farms consistently showed higher nitrogen levels, better water retention, and lower erosion rates than monoculture plots of equivalent size. The farmers themselves attributed these benefits to their practice of rotating crops seasonally and incorporating organic matter from household waste.
Which choice best states the main purpose of the text?