Final answer:
One of the reasons mentioned by Utah's politicians for opposing Biden's action is explained.
Step-by-step explanation:
The answer that is not one of the reasons noted by Utah's politicians for opposing Biden's action is 4) Biden doesn't have authority under the Antiquities Act to do this. The other three reasons mentioned, which are supported by Utah's politicians, include: 1) His actions deny people in Utah the right to decide what happens in Utah, 2) Unilateral action will only deepen the divisions in the country, and 3) They prefer a permanent solution decided by Congress.