Tropical forests are an example of natural resources. Natural resources are materials or substances that exist in the natural environment and are used by humans to satisfy their needs and wants. These resources are derived from nature and are not created by humans. Tropical forests are one of the most important and diverse natural resources on Earth.

1. Definition of tropical forests
Tropical forests are dense forests located in the tropics, which are regions close to the equator. They are characterized by high rainfall and year-round high temperatures. These forests are home to a wide variety of plant and animal species and are known for their rich biodiversity.

2. Importance as a natural resource
Tropical forests provide numerous benefits and services to both humans and the environment. Some of the key reasons why they are considered natural resources include:

- Biodiversity: Tropical forests are home to more than half of the world's plant and animal species. They contain an incredible amount of biodiversity, including many rare and endangered species. This biodiversity is important for ecological balance and the overall health of the planet.

- Oxygen production: Tropical forests are often referred to as the "lungs of the Earth" because they produce a significant amount of oxygen through the process of photosynthesis. They play a crucial role in maintaining the balance of oxygen and carbon dioxide in the atmosphere.

- Climate regulation: The dense vegetation in tropical forests helps regulate the climate by absorbing carbon dioxide and releasing oxygen. They also act as a buffer against extreme weather events such as hurricanes and floods.

- Water cycle: Tropical forests play a vital role in the water cycle by absorbing and retaining water. They act as natural sponges, preventing soil erosion and maintaining water quality. They also contribute to the formation of clouds and rainfall.

- Timber and non-timber products: Tropical forests are a valuable source of timber, providing wood for construction, furniture, and paper products. They also provide a wide range of non-timber forest products such as fruits, nuts, medicinal plants, and fibers.

- Cultural and recreational value: Tropical forests have cultural significance for many indigenous communities who rely on them for their livelihoods and traditional practices. They also attract tourists from around the world who are interested in experiencing the unique flora and fauna found in these forests.

In conclusion, tropical forests are a prime example of natural resources due to their immense biodiversity, ecological services, economic value, and cultural importance. They provide a wide range of benefits to humans and the environment, making their conservation and sustainable management crucial for future generations.