Which sentences comparative adjectives to talk about the same object? 1-Be careful,

Which sentences comparative adjectives to talk about the same object? 1-Be careful, the streets are overcrowded and the mountain walks dangerous.

2-The friendly mother is pushing a pram down a quiet street.

3-The man finds the tea tasty although a little salty.

4-This place makes the tastiest food, but the dining room is a bit smoky.

5-That designer works in a boring building and dirty fabrics.