Answer:
In the first instance or scenarios, Mrs. Bennet started talking about Jane and Bingley's relationship, and about their marriage to Lady Lucas. Mrs. Bennet was talking absolutely loudly, and all present could hear her including Mr. Darcy. Also Mary started singing to get the attention of all the people present, even after Mr. Bennet interrupted her. The other member that acted embarrassingly was Mr. Collins when he introduced himself to Mr. Darcy and when he said the unimportantly, long flattering speech.
Step-by-step explanation:
Embarrassing someone is simply disgracing that person publicly or privately which is bad. Elizabeth had every right to be angry because her family was dishonoring themselves and were acting badly.