Photosynthesis is important because all living things need oxygen in order to survive!
<span>By using superposition and cross cutting relationships, geologists can determine relative ages of rocks. This means they can determine which rocks are older and which are younger, but not the exact ages of the rocks. </span>
The energy that can be renewed again and again is known as renewable source of energy. Example : water, sunlight, wind et cetera.
The energy cannot be created again,once destroyed is known as non renewable source of energy.
The energy obtained from coal is non-renewable.
Energy obtained from burning plant waste is renewable
Energy obtained from water spring inside the earth is renewable.
Energy obtained from natural gas is non renewable.
Answer:
An higher being, or God created them.
Explanation:
This may not be the exact answer you are looking for, but lots of people looked to higher beings to make sense of the world before science.