How does insulation benefit a building?

Insulation plays a crucial role in a building's energy efficiency by minimizing heat transfer between the interior and exterior environments. This means that it helps to keep the desired temperature inside the building stable, reducing the need for excessive heating or cooling. As a result, it can significantly lower energy consumption, leading to lower utility bills and a reduced carbon footprint. By effectively managing heat flow, insulation contributes to a more comfortable indoor environment and enhances the overall sustainability of the building.

The other choices do not accurately reflect the benefits of insulation. Increasing the construction budget typically results from higher material costs, which does not align with insulation's purpose. Allowing more air flow through the walls would undermine insulation’s primary function, which is to create a barrier against unwanted heat transfer. Lastly, making a building more difficult to heat contradicts the goal of insulation, which is to retain heat and improve overall energy efficiency.