Question

The fire burnt the house. transitive or intransitive​

Answer 1

Answer:

Transitive.The answer

Answer 2

the house burned ( intransitive verb ) to the ground. But you are entirely correct about the meanings: In 1a/1b "was burned" is a passive transitive verb, so the meaning is that someone destroyed the house using fire. In 2a/2b "burned" is intransitive, so the meaning is that fire destroyed the house.