The phrase "settles on" refers to the act of deciding or choosing something. Instead of using this phrase repeatedly, there are several synonyms that can add variety and interest to your writing. You could use "chooses," "decides upon," "adopts," "selects," or "picks." If you are looking for a more formal synonym, you could use "determines," "resolves," or "settles upon." On the other hand, if you want to give your writing a more playful tone, you could use "opts for," "goes for," "plumps for," or "takes up." Whatever synonym you choose, it's important to choose one that accurately reflects your intended meaning and fits the tone of your writing.