Question

Which statement best explains why ecosystems are considered ``life-support systems'' for the biosphere?

• A. They provide recreational benefits
• B. They generate only food resources
• C. They maintain biogeochemical cycles and energy flow essential for life
• D. They increase industrial production

Hint:

Functions of ecosystems: \[ \boxed{ \begin{aligned} &\text{Energy flow}\\ &\text{Nutrient cycling}\\ &\text{Ecological balance}\\ &\text{Support of life} \end{aligned} } \]

Answer 1

The Correct Option is C

Step 1: Picture what an ecosystem actually keeps running.
Producers capture solar energy, this energy flows through food chains, and decomposers recycle nutrients like carbon and nitrogen back into the environment.
Step 2: See why this matters for the whole biosphere.
Without this continuous flow of energy and recycling of nutrients, living organisms would run out of both the energy and the raw materials they need to survive.
Step 3: Rule out the weaker options.
Recreation, food production alone, or industrial output are side benefits at best - they don't explain why ecosystems sustain life itself.
\[ \boxed{\text{They maintain biogeochemical cycles and energy flow essential for life}} \]