In the following question, a sentence is given having

Solution

"Ensure" means to make certain that something happens, which fits the idea of guaranteeing a smooth experience for visitors. "Improvements" refers to enhancements or upgrades, aligning with the context of better arrangements made in collaboration with authorities."Ascertain, adjustments" – "Ascertain" means to confirm or verify, which does not fit the meaning of guaranteeing a seamless experience."Warrant, compromises" – "Warrant" means to justify, and "compromises" implies making concessions, which has a negative connotation in this context."Jeopardize, enhancements" – "Jeopardize" means to put at risk, which contradicts the intended meaning of ensuring a seamless experience."Facilitate, setbacks" – "Facilitate" means to make something easier, but "setbacks" refers to obstacles, which does not match the context of positive developments.Thus, "ensure, improvements" is the best choice.