Explanation:

- Agnates: Direct descendants through the male line. This includes sons, grandsons, and further male lineage. They all trace back to a common male ancestor.

- Correct Answer

- Cognates: Descendants that can trace their lineage through both male and female lines. They are not limited to male ancestry.

- Lineal Kin: Includes all direct descendants, irrespective of gender. This can be through either or both parents.

- Collateral Kin: Relatives who share a common ancestor but are not direct descendants (like cousins, uncles, and aunts).