जमीनी सतह के निकट स्थिर वायुमंडलीय परिस्थितियाँ (Stable atmospheric conditions) मुख्य रूप से निम्नलिखित में से किसमें मदद करती हैं?

Prolonged exposure to extreme cold temperatures may result in tissue damage known as frostbite, which is categorized as a:

In the context of ecosystem energy dynamics, which of the following expressions correctly defines Net Primary Productivity (NPP)?