Question

the old boards that phil apparently uses for firewood arent long enough to wedge between the doorknob and the floor. source: love, hate & other filters in this sentence, wedge means to: select something for a specific purpose raise something from a lower to a higher position force into a tight space cut with a saw

Explanation:

The sentence mentions using boards as firewood and their length in relation to the space between doorknob and floor. "Wedge" in this context implies inserting (forcing) something (the board) into a tight space (between doorknob and floor). The other options don't fit the context of space - related action described.

Answer:

force into a tight space