Questions

Shorts and sneakers are generally considered a more athletic and casual look as this is best suitable for places like going to golf clubs, hiking, or riding a boat. Shorts can also be paired with variety of tops for different looks and sneakers offer foot protection. This outfit combination would benefit you if you're in a warm environment as it gives you more freedom of movement as you can feel the air on your knees and legs while walking with safety from your sneakers.

Conversely, jeans and flip-flops are a laid-back and relaxed combination of outfit as this is a perfect choice for short walks like going to a supermarket, relaxed social gatherings, or in a casual work environment. Jeans may offer flexibility in terms of pairing with different tops as it can still be casual but may have a slightly more dressed-up element while flip-flops give your feet and toes freedom to breathe while your legs (and ankles) are covered up with your denim pants.

Both are honestly what people wear during the hot season but I personally prefer shorts and sneakers as a man. Though most women I know would prefer jeans and flip-flops.