Answer:
a) Tents for night sky watch.
Step-by-step explanation:
Natural resources are materials or substances that occur in nature and can be used for economic gain. They are typically classified into three categories: renewable, non-renewable, and flow resources.
In this case, tents for night sky watch are not an example of natural resource usage because they are human-made products. Tents are manufactured using synthetic materials like nylon or polyester, which are derived from non-renewable resources such as petroleum.
On the other hand, options b), c), and d) are examples of natural resource usage:
b) Gasoline for public transportation: Gasoline is derived from crude oil, a non-renewable resource. It is used as fuel in vehicles for public transportation.
c) Trees to build furniture and houses: Trees are renewable resources that are used extensively for building purposes. Wood obtained from trees is used to construct furniture and houses.
d) Wind turbines for generating electricity: Wind turbines harness the power of wind, a flow resource, to generate electricity. This is an example of using a natural resource to produce energy.
Remember, understanding the different types of natural resources and how they are used is important in recognizing their impact on the environment and making sustainable choices.