Explanation:

Sure, let’s break down the options:

- Option 1: Morgan

Lewis Henry Morgan is the guy who divided kinship terminology into two categories: classificatory and descriptive. Classificatory terms group several relatives under the same label (like calling all cousins “brother” or “sister”), while descriptive terms tell you exactly how someone is related (like “mother’s brother”).

- Option 2: Radcliffe-Brown

Radcliffe-Brown focused more on the function of kinship in societies—not so much on the terms themselves or how they’re grouped.

- Option 3: Malinowski

Malinowski talked a lot about family roles and practical relationships but didn’t come up with the classificatory/descriptive terminology distinction.

- Option 4: Kroeber

Kroeber worked in kinship studies but didn’t originate this particular classification. He built on Morgan’s ideas instead.

Bottom line:

Morgan kicked off the theory about classificatory and descriptive kinship terminology. That’s a fact.