Question

sort the words according to the meanings of their shared roots. humanoid overpopulation repopulated spheroid metalloid popularity similar people

Explanation:

• The suffix "-oid" means "resembling" or "similar to". So words with "-oid" (humanoid, spheroid, metalloid) go to "similar".
• Words related to "people" are those with root related to population. "Overpopulation" (excessive number of people), "repopulated" (restocked with people), "popularity" (related to how liked by people) go to "people".

Answer:

similar: humanoid, spheroid, metalloid
people: overpopulation, repopulated, popularity