What are the similarities between linear, interactive, and transactional models of communication

The interactive model on the other hand, although similar to the linear model shows that for interaction is an element of communication. In the transactional model, communicators can simultaneously be sender and receiver, because a message can be send back and forth between communicators

Explanation:

the answer is subjective. i personally agree with the first answer for this question.

if one isn't strictly talking about objects then the correct answer would be 'my eyes' since according to this riddle i am asleep and in order to answer/open the door i need to open my eyes first of all.

however, if one is specifically looking for an object, then the first thing i would open would be the door

hope this !