Final answer:
Your friend is engaged in organic agriculture, which promotes ecological balance and biodiversity without synthetic chemicals, using methods like composting and biological pest control.
Step-by-step explanation:
When your friend decides to not use pesticides or synthetic chemicals on her farm and instead relies on composting and biological pest control, she is practicing organic agriculture. Organic agriculture focuses on promoting ecological balance and conserving biodiversity. It avoids the use of chemical fertilizers and pesticides, instead relying on techniques such as composting to improve soil fertility, crop rotation to break the cycle of pests, and biological pest control for managing pests naturally.
Organic agriculture often aligns with the principles of sustainable agriculture, which seeks to be ecologically sustainable, economically viable, and socially responsible. Unlike industrial agriculture or monoculture, which often rely heavily on synthetic chemicals and can lead to soil depletion and other environmental issues, organic and sustainable practices aim to maintain the health and productivity of ecosystems indefinitely.