Answer:
Mercury
Step-by-step explanation:
The planet from which you will have the easiest time escaping its gravitational pull is the one with the weakest gravity. Since gravity is directly proportional to mass, the larger or more massive a planet is, the higher the gravity. Therefore, the smallest planet would have the weakest one. Since Mercury is the smallest planet in the solar system, it would also have the weakest gravity, and would therefore be the easiest to escape from. Hope this helps!