Final answer:
The four greenhouse uses include protecting plants from extreme weather, extending growing seasons, cultivating non-native plants, and supporting botanical and agricultural research.
Step-by-step explanation:
The student is asking to name the four uses of greenhouses, not the reasons for using them. Greenhouses serve various functions such as:
- Protecting plants from extreme weather conditions.
- Extending growing seasons for food crops.
- Cultivating plants that are not native to the local climate.
- Facilitating research and education in botany and agriculture.
These uses allow for controlled environmental conditions that can support the growth and study of plants that require specific temperature, humidity, and light conditions. Greenhouses utilize materials that permit sunlight to enter but trap heat, much like the greenhouse effect caused by greenhouse gases in Earth's atmosphere.