The correct answer is a) A thermostat that controls the heat in your home.
A negative feedback loop is a process that counteracts changes, helping to maintain equilibrium. In this case, when a thermostat detects that the temperature in a home has fallen below a set point, it activates the heating system to increase the temperature back to the desired level, demonstrating a negative feedback mechanism.
The other options do not represent negative feedback loops:
- b) Loss of biodiversity typically represents a harmful and unregulated process rather than a feedback loop.
- c) Fruit ripening often involves positive feedback, as the ripening of one fruit can stimulate the ripening of others.
- d) Convection currents relate to the movement of fluids and can involve feedback processes but are not specifically a negative feedback loop in the context provided.