Answer:


What is carbon hydro

<h3><u>A hydrocarbon is a molecule whose structure includes only hydrogen and carbon atoms</u></h3>
Explanation:
<h3> <u>
<em>The carbon atoms join together to form the framework of the compound, and the hydrogen atoms attach to them in many different configurations.</em></u></h3><h3><u>
<em /></u></h3><h3><u>
<em /></u>

<u>
<em /></u></h3>
Answer:
The chemical and electrical signals are used by brain for communication,sensation and thought. Brain uses electrical signals from communication.
The rotation of the earth around the sun
Plant cells? maybe? i learned this last year
We live<span> in the Holocene.
Hope this helped :)</span>