What type of anchor includes vehicles, frame, axel, and wheel?

The correct answer is Portable Anchor. A portable anchor is designed to be easily moved and set up in various locations, and in this case, vehicles can be utilized as anchors due to their structure and weight. The key components of a vehicle, such as the frame, axle, and wheel, provide stability and strength that are necessary for effective anchoring in rescue operations.

Portable anchors are often relied upon in situations where a more permanent or fixed anchor is not available, allowing rescuers to adapt to changing environments. This flexibility makes vehicles a practical choice, as they can be positioned strategically to provide the necessary support for rope rescue operations.

Natural anchors generally consist of elements from the natural environment, like trees or rock formations, while structural anchors involve built structures. Fixed anchors are permanent installations, often designed for specific applications. In contrast, a portable anchor's adaptability is its defining feature, making it a valuable tool in various rescue scenarios.