The correct answer is option B, that is, a compound.
A substance, which is formed of two or more different elements is known as a compound. Carbon dioxide refers to a compound, comprising of three molecules that are made up of two elements, chemically combined with each other, that is, one carbon atom and two oxygen atoms. It is a chemical compound generally in the form of a gas.
<span>B is the correct answer. Carbon dioxide is a compound of two elements, carbon and oxygen. There are two oxygen molecules for every carbon molecule in the compound. </span>
An organism that cannot make its own food is called a heterotroph. All animals and species of fungi, along with some types of bacteria, are heterotrophs.
