Answer:
Direct object
Explanation:
As you said in a previous comment that the word to be analyzed is THEM it can be said that that word functions as a direct object in the sentence.
A direct object has the function of being the recipient of the verb. You can discover the direct object of a sentence by asking the question Verb + what? In the example given you should ask yourself "pass what?" And the answer is "Them" (it is making reference to the potatoes)
