What do you call the traveling to a holy site in a religion that is required by the religion?

Pilgrimages

Explanation:

Pilgrimages frequently involve a journey or search of moral or spiritual significance. Typically, it is a journey to a shrine or other location of importance to a person's beliefs and faith, although sometimes it can be a metaphorical journey into someone's own beliefs. - Gooogle.

this is not plagiarism because I’m giving credit.

answer:

d. because dr. laguardia selected a widely used measure, his study generalizes to has strong external validity. external validity has limited external validity. other applications of this measure.

the widely used measure that he applied to his experiment was the benton facial recognition test. it employed on to football players and as result, only players who suffered brain concussions did not pas this test. and although it has an external validity, it is limited because it isn't general to apply to other population.