(a.) Volvox is a water living plant.
(b.)Zooplanktons are primary consumers of the pond ecosystem.

Explanation

### Step-by-Step Solution:

1. **Understanding the First Statement**:
- The first statement claims that "Volvox is a water living plant."
- Volvox is indeed a type of green algae that lives in freshwater environments such as ponds. It forms spherical colonies and is classified as a plant-like organism.

2. **Evaluating the First Statement**:
- Since Volvox is primarily found in water and is a photosynthetic organism, this statement is **correct**.
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