मीनामाता रोग एक तंत्रिका संबंधी विकार है जो किस भारी धातु की गंभीर विषाक्तता के कारण होता है?

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)?