निम्नलिखित में से कौन सा पर्यावरण अध्ययन (EVS) के अधिगम में एक प्रक्रिया कौशल (Process Skill) को दर्शाता है?

Prolonged occupational exposure to excessive noise from heavy machinery without hearing protection causes noise-induced hearing loss. Excess noise is categorized as a:

Long-term exposure to indoor air pollutants, such as smoke from burning biomass fuels, significantly increases the risk of developing chronic respiratory conditions like: