What is the meaning of the phrase “be attached to sth./ sb.” in the following sentence.The bird got so attached to her that it would take food from between her lips.

What is the meaning of the phrase “be attached to sth./ sb.” in the following sentence.The bird got so attached to her that it would take food from between her lips.
A.like sb.or sth.very much
B.try hard
C.look beautiful
D.hate
正确答案：like sb.or sth.very much