Which of the following sentences is correct?

The correct answer is Option (2) → Our hockey coach objects to players using their phones during practice.

“Object to” + -ing:

• In “object to”, the word “to” is a preposition. It is not part of the verb that follows.
• So the verb after it takes the -ing form: “objects to players using”.

Why the Other Options are Incorrect?

Option 1: Our hockey coach objects to players to use their phones during practice. — Incorrect. “To” in “object to” is a preposition, so the verb after it must be “using”, not “to use”.

Option 3: Our hockey coach objects players using their phones during practice. — Incorrect. “Object” needs “to” before the thing that we do not like.

Option 4: Our hockey coach objects on players using their phones during practice. — Incorrect. “Object” takes “to”, not “on”.