Question

question 5
once, as an owner, you know that the cat is not just making senseless noises without any rhyme or reason but is making an attempt to communicate, you can make an effort to communicate back.
no change
making senseless noises
senselessly making noises with no thought involved.
making senseless noises, having no idea what they mean,

Explanation:

The original phrase "making senseless noises without any rhyme or reason" is word - y and a bit redundant. The most concise and clear option is "making senseless noises" which conveys the same meaning effectively.

Answer:

making senseless noises