The true statement is that Ian sands wood parts, as shown in the penultimate answer option.
At the beginning of the question, we can see that all wooden parts must be sanded with a belt sander and soon after, we can see that Ian is using a belt sander.
These two premises allow us to conclude that Ian is sanding pieces of wood and we can reach this conclusion through deductive reasoning.
Therefore, we can say the correct answer is the last answer option.
More information on deductive reasoning at the link:
https://brainly.com/question/860494