Something (as a mineral, water power source, forest, or kind of animal) that is found in nature and is valuable to humans.

The conservation of natural resources in biology reflects the ecological imperative to preserve natural places in the world, such as forests and coral.

A fossil fuel is a hydrocarbon-based fuel that originally was living organic matter millions of years ago. This organic matter was covered by time.

Coal is known to have originated from biological sources, so it is not categorized as a mineral.

The correct answer is : Renewable natural resources are defined as the type of natural resources that can get back to their previous stock.

When lava flows, one might see in Hawaii, they might be red because they're hot and glowing, but as the lava cools, the lava will become a black or an orange, or a red or brown, depending on the oxidation state

There are probably at least a couple thousand different kinds of rocks, but every one is unique. Rock is composed of a mixture of minerals, and if you've looked around outdoors you might even notice the granite in central Idaho looks a little different from one place to the next. It is estimated that 300 names help sort rocks into categories between sedimentary-, igneous-, and metamorphic-type rocks.

Rocks are usually valuable either for their beauty and their decorative value, or else for a valuable element that they contain. Gold is the one that you might be thinking of, but many times we get valuable things from the earth that we may not appreciate, such as certain rocks that are used in jet engines and for lubricants and are important ingredients in many specialty steels. And so it's the use of something, whether it is sand or gravel, or gold, that makes it valuable.