In this sentence, what part of speech is the word in bold?

the opening notes of the song caught my ear.

i'm not sure about this, can anyone ?

What does tyler tell his boss to do after firing him

Write an explanation for how to perform some kind of physical activity, such as riding a bike or playing a sport. the explanation should be geared toward someone who has never performed the activity. be sure to explain the steps in the process clearly, organize your ideas appropriately, use text features

Define the following word using the meaning of the suffix. use your dictionary if you are uncertain of the definition. argument a. full of disagreement b. act of disagreement c. state of disagreement d. quality of disagreement