To understand the working principle of concentrating solar power technology, we need to explore how this technology captures and utilizes solar energy to generate electricity.

Concentrating solar technology is based on the use of mirrors or lenses to focus a large area of sunlight, or solar thermal energy, onto a small area. The concentrated energy is used to generate heat that can produce steam. This steam is then used to drive a turbine connected to an electric generator, thereby producing electricity. Therefore, the correct option is:

• uses mirrors to focus sunlight, generating heat that drives turbines to produce electricity

Let's analyze why this option is correct and the others are not:

1. The option stating "uses sunlight energy to directly rotate turbines without a heat conversion stage" is incorrect. Turbines in concentrating solar power systems do not rotate directly from sunlight; they require steam generated from focused solar heat.
2. The option stating "directly converts sunlight into electricity using photovoltaic (PV) panels" is incorrect. This describes photovoltaic technology, not concentrating solar technology.
3. The option stating "produces heat from sunlight without using mirrors or optical concentration" is incorrect. Concentrating solar power relies on optical devices such as mirrors to focus sunlight.

In conclusion, concentrating solar power is characterized by using mirrors or lenses to focus sunlight, which heats a fluid and ultimately drives a turbine to generate electricity. This technology is distinct from photovoltaic systems that directly convert sunlight into electrical energy.