Final answer:
The correct answer is C) logjam. When surfing, a logjam refers to a situation where logs float together and create obstacles in the water.
Step-by-step explanation:
The correct answer is C) logjam. When surfing, a logjam refers to a situation where logs float together and create obstacles in the water. This can be dangerous for surfers as it can cause collisions or make it difficult to navigate through the water.
Logfloat, logroll, and loghorn are not directly related to surfing. Logfloat and logroll are not commonly used terms, while loghorn refers to a part of a musical instrument. Therefore, the answer is C) logjam as it is the term associated with surfing.