How does the presence of diverse wildlife affect the ecosystem services that benefit human populations?

Diverse wildlife keeps ecosystems balanced by controlling pests, pollinating plants, and breaking down waste, which makes cities cleaner and healthier for people. When insects, birds, and microbes work together, they help recycle nutrients, keep water clean, and reduce the need for chemical pesticides. For example, a neighborhood garden with bees, ladybugs, and worms can grow fruit and veggies without chemical help, while the worms aerate the soil. This natural support means lower costs for farmers and lower pollution for residents. In short, a variety of animals and plants act like a free, reliable service that protects human health and saves money.