Which homophone best completes the sentence? every fall, the oak tree in the garden sheds leaves. their there it’s its

The homophone that best completes the sentence would be "its" because both their and there wouldn't work, and it's would be saying "it is".

Refute it, showing why it is mistaken—an apparent but not real problem; acknowledge its validity or plausibility, but suggest why on balance it's relatively less important or less likely than what you propose, and thus doesn't overturn it; concede its force and complicate your idea accordingly—restate your thesis in a more exact, qualified, or nuanced way that takes account of the objection, or start a new section in which you consider your topic in light of it. this will work if the counterargument concerns only an aspect of your argument; if it undermines your whole case, you need a new thesis.

Go to school and learn fool