What is the best choice to be safe while riding your bicycle?

Wear a helmet to protect your head.

Explanation:

Although helmet use by cyclists is not mandatory, many experts recommend and influence the use of the equipment. The recommendation is based on the fact that bicycle accidents are common and overturns exist. Like any two-wheeled vehicle, the bike is subject to falls and there is nothing to stop the rider from banging his head on the sidewalk or asphalt. For this reason, we can say that the best safety option when riding a bike is to wear a helmet and to protect the head.

this is really easy just look up what these words mean

i don't think so because different teachers have different materials. tehy teach differently, unless you know for sure your teacher is the exact same as others. i would just contact ur teacher