College students at 50 campuses around the country were polled to find out how many students own smartphones. this small representative group of students is called a:

Sample

Explanation:

Since it is not very practical to poll a whole population, professional surveyors choose a sample of persons from a wide variety in representation for the rest of the individuals of a geographical region. To understand the way these people are selected is helpful to define how well their criteria will match with the rest of the voters.

personal narrative

first person fiction

etc.

i think the answer is second