Final answer:
The outcome that best completes the diagram is the conversion of natural habitat to farmland.
Step-by-step explanation:
The outcome that best completes the diagram is Option 2: The conversion of natural habitat to farmland.
Increased population growth leads to an increased demand for higher crop yields. To meet this demand, more land needs to be converted into farmland. This conversion of natural habitats into farmland can have negative consequences on biodiversity and the environment.