What role does the compressor's bleed-air play in relation to ice?

The function of the compressor's bleed-air in relation to ice primarily focuses on preventing the adhesion of ice on critical components of the engine, such as the leading edges of the fan blades and other surfaces where moisture might freeze.

Bleed-air is extracted from the compressor stage of the engine and is often directed to specific areas where ice formation is likely to occur. By heating these surfaces, the bleed-air helps maintain the temperature above freezing, which effectively reduces the risk of ice accumulation. This is particularly important in ensuring the safe and efficient operation of the gas turbine engine, as ice can disrupt airflow, lead to performance issues, and even cause engine failure.

The other options relate to functions that do not specifically address the relationship between bleed-air and ice. For example, while bleed-air does play a role in various engine operations, its primary relevance concerning ice is its ability to prevent adhesion, making the first choice the most accurate answer in this context.