Which of the following is the best definition of a compound? A compound is composed of molecules which contain atoms of two or more
different elements in a fixed ratio.

A substance that cannot be broken down into other substances by chemical
processes

A compound is a solution containing a solvent and at least two kinds of solute
molecules

A compound is composed of molecules which contain a fixed number of atoms.

Explanation:

best definition isA compound is composed of molecules which contain atoms of two or moredifferent elements in a fixed ratio.

1. when the tempature rises,your sweat glands and then springs into action making perspiration. some sweat evaporates with your skin taling heat with it.2.some of the blood pumped by the heart travels by your lungs to get rid of carbon dioxide and pick up oxygen.3.saliva produces by, you drinking water which saliva is 98% of. when mucus builds up in your body it also creates saliva as well as, antibacterial compunds.4.when the core body tempature drops, the shivering reflex is triggered to maintain homeostasis. for example: when you get out the pool you start to shiver because it is cold.

Can you put the picture?