The answer would be B.) they can never be depleted. Renewable resources are resources that are, unlike nonrenewable resources (i.e coal, oil, any other fossil fuels, etc.) cannot run out. Examples include sunlight, wind, and water (water never really runs out due to the water cycle).
The hydrates are molecules that have absorbed water from the environment.
Some anhydrous compounds are hygroscopic, which means that they absorb humidity (water) from the environment.
When an anhydrous compound absorb water it transform into a hydrate compound.
Then the obvious application of an ahydrous is to control or decrease the humidity in areas where it may cause the formation of mold or other damages to the surfaces (walls), packages (cardboard), or products (wood or food) contained in the area.
The students hypothesis would be something like:
"I believe that some seeds must be exposed to cold before they germinate."
But what the student is missing is some samples from seeds that are not exposed to cold, since they are trying to figure out whether the seeds should be exposed to cold or not.
No, the correct answer is Ecosystem
