I choose sound, hearing. You people are underestimagint smell. Smell is a very powerful sense. Imagine you have to choose a partner. U need sight to see her/him, you need touch to feel the... whatever is that you do, you need taste to taste... the food she/he will cook for you, and you need smell, not just to smell them, but smell allows for you to sense your partners fermones, important chemical scent that can have u head over your heals about someone! Why ? Because someone with a different immune system than you has appealing feromones to your senses, which you don't even know you are smelling. Having an offspring with someone that has a differnt immune system than you is benefiecial, so your kid will get more protection from illness. And lastly, you don't have to hear them, you don't have to hear them yack or their stupid stories. Also there are many other ways of communication than just hearing, but no other ways to taste( fooood, no way you can give that up), smell( the morning fresh grass, or the intoxicating smell of a stranger on the bus,) sight( the best sense everrrrr), and touch,( ahhh, you need touch, how can you tell wether your hot water is cold or hot enough), but hearing is only for communication( and movies
, but there are subtitles
), and if your partner will really love you, they will learn sign language or how to read lips, so it's like a test of love also. I'm not really sure on what I just wrote, but you prlbly get the idea.