Which of the following can utilize light energy for the synthesis of
ATP ?

Options

A. Slime molds
B. Cephaleuros
C. Halophiles
D. Thermoacidophills

Answer

To solve the question "Which of the following can utilize light energy for the synthesis of ATP?", we will analyze each of the provided options step by step.

### Step-by-Step Solution:

1. **Understand the Question**: The question is asking which organisms can use light energy to produce ATP, which is a crucial energy currency in biological systems.

2. **Evaluate Option A: Slime Molds**:
- Slime molds are classified as saprophytic protists.
- They obtain their energy by decomposing organic matter and do not utilize light energy for ATP synthesis.
- **Conclusion**: Slime molds cannot synthesize ATP using light energy.

3. **Evaluate Option B: Cephalouris**:
- Cephalouris refers to a group of saprophytic organisms.
- Similar to slime molds, they do not utilize light energy for ATP synthesis but rather derive energy from decomposing organic material.
- **Conclusion**: Cephalouris cannot synthesize ATP using light energy.

4. **Evaluate Option C: Halophiles**:
- Halophiles are organisms that thrive in high-salinity environments, such as salt lakes.
- Some halophiles, particularly certain bacteria, can perform photosynthesis and utilize light energy to synthesize ATP.
- **Conclusion**: Halophiles can synthesize ATP using light energy, making this option a potential correct answer.

5. **Evaluate Option D: Thermoacetophiles**:
- Thermoacetophiles are organisms that thrive in high-temperature environments and often utilize chemical energy from organic acids.
- They do not utilize light energy for ATP synthesis.
- **Conclusion**: Thermoacetophiles cannot synthesize ATP using light energy.

6. **Final Conclusion**: After evaluating all options, the only organism that can utilize light energy for the synthesis of ATP is **Halophiles** (Option C).

### Answer:
**C. Halophiles**