The first step for initiation of photsynthesis will be:

Options

A. Photolysis of water
B. Excitement of chlorophyll molecule due to absorption of light
C. ATP formation
D. Glucose formation

Answer

To determine the first step for the initiation of photosynthesis, we need to understand the processes involved in photosynthesis.

### Step-by-Step Solution:

1. **Understanding Photosynthesis**: Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy stored in glucose. This process involves two main stages: the light-dependent reactions and the light-independent reactions (Calvin cycle).

2. **Identifying the First Step**: The light-dependent reactions occur in the thylakoid membranes of the chloroplasts and require light. The first step in these reactions is crucial for the overall process of photosynthesis.

3. **Options Analysis**:
- **Option A: Photolysis of Water**: This occurs later in the light-dependent reactions where water is split to release oxygen, electrons, and protons.
- **Option B: Excitement of Chlorophyll Molecule due to Absorption of Light**: This is the initial step where chlorophyll absorbs light energy, which excites electrons and starts the process of converting light energy into chemical energy.
- **Option C: ATP Formation**: This occurs after the chlorophyll has been excited and is part of the light-dependent reactions.
- **Option D: Glucose Formation**: This occurs during the light-independent reactions and is not the first step.

4. **Conclusion**: The first step in the initiation of photosynthesis is the excitement of the chlorophyll molecule due to the absorption of light. This step is essential as it sets off the chain of reactions that lead to the production of ATP and NADPH, which are necessary for the subsequent steps of photosynthesis.

### Final Answer:
The first step for the initiation of photosynthesis is **Option B: Excitement of chlorophyll molecule due to absorption of light**.

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