Final answer:
a) Moderate noise. c) Soft music. d) High temperature. The ability to think clearly and ride safely can be affected by moderate noise, soft music, and high temperature.
Step-by-step explanation:
The ability to think clearly and ride safely can be affected by a) moderate noise, c) soft music, and d) high temperature.
Noise can distract a person's attention and make it difficult to concentrate, so moderate noise may affect one's ability to think clearly and ride safely. Soft music can have a calming effect and help improve focus, which can enhance the ability to think clearly and ride safely. High temperature can cause discomfort, fatigue, and dehydration, which can impair cognitive function and motor skills, making it unsafe to ride.