Hi
If I were you I would do the following:
1.- Before your Condition action block, add an 'Initialize variable' action block, Name 'myResponsesArray', Type Array, Value empty
2.- Inside your Apply to each, replace 'send a new email' and add 'Append to Array variable' action block instead. Assign it 'Responses Comments' dynamic input as its value.
3.- At the bottom of your 'True branch' of your condition, but OUTSIDE 'Apply to Each', add 'Send new email' with your three email addresses.
In the body add the following expression:
join(variables('myResponsesArray'),' # ')
Hope this helps