Which sentence best shows correct comma usage?
native american groups include the mayan the aztec, and the toltec people.
native american groups, include the mayan the aztec and the toltec people.
native american groups include the mayan, the aztec and the toltec people,
native american groups include the mayan, the aztec, and the toltec people.

Explanation:

Native American groups include the Mayan, the Aztec and the Toltec people.

the unsaturated fatty acid is a fat consist of one or more double bond in the fatty acid chain. if it contains one double bond then called as monounsaturated fatty acid however if, it contains more than one bonds called as a polyunsaturated fatty acid. true fatty acids are called unsaturated fatty acids as it reduces the risk of high blood cholesterol and good for health.

answer: the three main types of third-person point of view are: white employ the third-person-omniscient point of view. third-person limited: a narrator reports the facts and interprets events from the perspective of a single character.

explanation: