Answer 1: A flabby expression is the one which consists of the expressions that make it difficult or inhibiting for the people o understand the main point in a sentence. It hinders complete understanding of what is being conveyed. Following are such sentenced;
Answer 2:
Being concise is one of the major tools used to write business emails and messages to save time of the reader and also convey the message.
a) Because every other office is occupied, it’s recommended that we should convert Dr. Blake’s office into a lounge
b) You can assist callers in many ways.
c) The team has finished the accounting assignment. Please review our questions in column D.
d) I would like to inform you that the Johnson report might not be complete by the deadline.
Answer 3:
Redundancy is the presence of words or sentences that are not required or that have been repeated in a sentence for no real reason at all.
In the question above, the word "absolutely" is redundant because it is followed by the term "essential" which very well identifies the absolute nature and importance of the act followed ahead.
Both the words are hinting towards the same meaning which makes it redundant.