41. Compare portal and passage tombs. What is one thing these tombs have in common? Both consist of a passageway to a burial chamber.

The purpose of both of them is still a mystery.

Both are constructed with several upright stone blocks with a capstone placed over them.

Both are types of dolmans.

The similarity between portal tombs and passage tombs is that Both consist of a passageway to a burial chamber.

Portal tombs:

Passage tombs also hold human remains much like portal tombs do so we can say that both types of tombs can be described as passageways that lead to a burial chamber.

In conclusion, option C is correct.

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