Which factor caused Paleolithic North Americans to hunt small animals and gather more plants to survive?

The correct answer is letter A

Paleolithic is one of the periods in which Prehistory is divided. It is the first of the periods, being commonly understood between 2.7 million years until 10,000 years ago.

Paleolithic is also known as Chipped Stone Age. This name is due to an ability developed by the first human beings in the production of tools and work instruments.

To use the stones as sharp objects, used for various daily activities, people from that period beat one stone on the other (usually flint, quartz and quartzite) in order to chip one of them and thus create a rudimentary blade, used to cut or scrape. With these stones, they could build axes and other instruments. Animal bones and teeth were also used as tools.

The human beings of that period were nomads, not settling in the same place for long. They lived off the collection of fruits and roots, as well as fishing, hunting and the search for animal carcasses left by other carnivores.

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yup! you are correct it is b.