2some bicyclists create unsafe situations by riding for the traffic environment and weather conditions.

The correct answer for the exercise: Some bicyclists create unsafe situations by riding for the traffic environment and weather conditions. Is: At excessive speeds.

Explanation:

To understand this question and answer we have to analyze them. First of all, bicyclists are drivers with a less developed vehicle. Thus, the amount of danger they can provide or face compared to other drivers is higher. This is because bicycles don't have as many security mechanisms like trucks, cars, and motorcycle have. They also are not prepared to prevent the impact of accidents and are not provided with safety-focused buildings like other vehicles. That is why some of them can be creators of unsafe situations for the traffic environment and weather conditions.

a would be the answer