According to the working memory theory of listening, people find it harder to listen when they are expected to remember everything they hear they are distracted by surrounding noise they are part of a large group their capacity for listening has been reached.

their capacity for listening has been reached.                                      

Explanation:

          According to the working memory theory of listening, when the listening capacity of the human being is finally reached, people find it hard to remember what they hears.

        It is theory where it becomes difficult to concentrate and remember what they hears when people's short term memory is reached or is full. It occurs when people have already heard many things and there is no practical no free space for new information to be remembered.

Hence the answer is ---

"their capacity for listening has been reached".  

it´s related to his charming character.

beauty is not everything, although we can joke that girls only care about the physical or material aspect, the truth is that a real woman looks at more important things, besides intelligence and personality, there are other attitudes that make irresistible to men who are 'unattractive'.

for example develop your sense of humor.

it's