What is the purpose of a hose?

The purpose of a hose is primarily to transport gases safely without release, which aligns with the answer selected. Hoses are specifically designed to convey materials such as liquids and gases under various pressures without allowing for leaks. This safety feature is crucial in many industrial applications, where the control of gas flow is essential to prevent hazards, including toxic releases or explosions.

In contexts like construction, where workers may be handling pressurized systems or volatile substances, the integrity of hoses is vital. They must meet specific standards to ensure they can safely contain the gases being transported, preventing accidents that could arise from leaks or bursts.

Other options present functions that hoses do not typically perform. Hoses are not generally intended to carry solid materials, which is better suited for rigid piping or other conveyance methods. While they can cool heated gases through induced airflow or via heat exchanges, this is not their primary design function. Similarly, filtering out impurities involves a different process with specialized filters and cannot be accomplished by a standard hose alone. This highlights why transporting gases safely is the most accurate and relevant purpose for a hose in this context.