Afriendship is one that allows you to express your emotions and increases happiness.
a. close
b. dysfunctional
c. casual
d. estranged

Let us define each:

·         Close is to cover the opening of something

·         Dysfunctional is the condition of having poor and unhealthy behaviors and attitudes within a group of people

·         Casual done without much thought

·         Estranged is to cause someone to be no longer involved or connected

Therefore,

A close friendship is one that allows you to express your emotions and increases happiness.

A close (A) friendship is one that allows you to express your emotions and increase happiness.

When you are close with someone you are able to be your true self  and tell the other person how you feel. If the friendship is casual, you might not feel comfortable sharing this information. A dysfuntional friendship is one that does not work well. An estranged friendship is one in which you have not seen eachother for a long time.

just say it's your friend did it and you had no idea?