जब किसी जलाशय में पोषक तत्वों की प्रचुरता बढ़ जाती है, तो इस प्रक्रिया को क्या कहा जाता 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)?