What is the naming part in sentence I like to look at birds.?

The naming part of the sentence "I like to look at birds" is "I".

Here's why:

* "I" is the subject of the sentence, which means it is the person or thing performing the action.

* "like" is the verb, indicating the action.

* "to look at birds" is the object of the verb, specifying what the subject likes to do.

Therefore, "I" is the part of the sentence that names the person who likes to look at birds.