"Blow a bubble in the air,
Bubbles, bubbles, everywhere."
“whose father worked for the railroad” is a subordinate clause as it is a relative clause beginning with the pronoun “whose”. It is particularly used in written English and it refers to possession of things or to make association or connections with other things or people.
Answer:
I believe the answer is verb.
Explanation:
Opening is an action so it is a verb. hope this helps.
