10 класс. Английский язык. ЛЕКСИКА. Real life vocabulary

I also have two wheels but I am a motorized vehicle. I usually carry one passenger but, sometimes, I carry two people when they sit one in front of the other. I am usually faster than a car but people who ride me are exposed to the elements and not protected by any outer shell. What am I? ..........

• A tractor
• A motorcycle
• A taxi
• A ship