Final answer:
The correct option is (3). Mechanical breakdown of equipment. The equipment breakdown endorsement covers losses related to mechanical breakdowns of equipment, not natural disaster-related damage or loss of business income.
Step-by-step explanation:
An equipment breakdown endorsement is an insurance coverage option that specifically indemnifies the insured for losses related to the mechanical breakdown of equipment. This coverage is essential in situations where a business relies on machinery and equipment to operate its daily functions.
It does not cover damages related to natural disasters such as earthquakes or floods, nor does it typically provide indemnification for loss of business income unless this is specified as part of the coverage. The purpose of such an endorsement is to offer financial protection against the occurrence of economic risks over which a business has little control, like a sudden and unforeseen mechanical failure, which is outside the scope of most standard property insurance policies.