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:

Are constructed with stone blocks which are upright and have a capstone over them. Lead to a place that holds human remains.

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.

Find out more about passage tombs at link.

It is interweaving of the melodic lines with harmony

The answer is a if martyn did it without owner's permission.: )