Without __ , motorcycle riders are at risk of severe injury in a crash. a lot of horsepower proper protection sharp skills quick thinking

## Step 1<br />The problem is a fill-in-the-blank type question. The sentence is about the risks motorcycle riders face in a crash. The options provided are "a lot of horsepower", "proper protection", "sharp skills", and "quick thinking".<br />## Step 2<br />We need to choose the option that best fits the context of the sentence. The sentence is discussing the risks of a crash, so the missing word should be something that can prevent or reduce the risk of injury.<br />## Step 3<br />Among the options, "proper protection" is the most suitable. This is because having proper protection, such as helmets and other safety gear, can significantly reduce the risk of severe injury in a crash.<br />## Step 4<br />The other options, "a lot of horsepower", "sharp skills", and "quick thinking", do not directly relate to the prevention of injury in a crash. Therefore, they are not the correct answers.