Biomass
Biomass explained in an easy to understand way:
Imagine trying to figure out how much food is in your fridge without opening it. Just as you estimate the total amount of groceries by considering the weight and volume of each food item you've put in there over time, biomass measures the total mass of all living matter in a specific area. In this analogy, each food item represents an individual organism, and your fridge is the given area; together, they combine to give you an overall sense of fullness or total mass, just like biomass does in an ecosystem.
Practice Version
Biomass: Organic matter or animal waste that can be burned for energy. Biomass. Biomass is material from plants and animals that can be used as a renewable energy source.