Which of the following is prohibited on the beach or trails?

E-cycles are typically prohibited on beaches or trails due to safety and environmental concerns. These electric bicycles can pose a risk to pedestrians and other cyclists by traveling at higher speeds, making them potentially dangerous in crowded areas. Additionally, the use of e-cycles can lead to soil erosion and damage to delicate ecosystems found in these natural settings. Regulations often aim to preserve the integrity of the environment and ensure a safe, enjoyable experience for all visitors.

In contrast, the other activities mentioned, such as using surfboards, setting up umbrellas, and engaging in wildlife monitoring, are generally permitted as they do not inherently disrupt the environment or the safety of other users in the same way. Surfboards are commonly used in designated surf areas, umbrellas serve a practical purpose for beachgoers, providing shade, and wildlife monitoring is crucial for conservation efforts and understanding local ecosystems.