What are the three main protection methods against cave-ins?.

1. The greatest risk in an excavation is a cave-in.

2.Employees can be protected through sloping, shielding, and shoring the excavation.

3.A competent person is responsible to inspect the excavation.

4. Other excavation hazards include water accumulation, oxygen deficiency, toxic fumes, falls, and mobile equipment.
Hope this helps if right mark Brainlest!! Have a good day