To . . . . . . . yourself from . . . . . . . wear warm clothes.

The correct answer is B. To protect yourself from cold, wear warm clothes.

The other options are incorrect because:

• A. To prohibit something means to forbid it. In this case, we are not forbidding ourselves from cold, we are trying to protect ourselves from it.
• C. To save something means to keep it from being lost or destroyed. In this case, we are not trying to keep cold from being lost or destroyed, we are trying to protect ourselves from it.
• D. To suffer something means to experience pain or distress. In this case, we are not trying to experience cold, we are trying to protect ourselves from it.
• E. To prevent something means to stop it from happening. In this case, we are not trying to stop cold from happening, we are trying to protect ourselves from it.