The chloroplast's pigment I present in the `"__________"` part of the membrane.

Explanation

**Step-by-Step Solution:**

1. **Understanding Chloroplast Structure**: Chloroplasts are the organelles in plant cells where photosynthesis occurs. They contain various membranes, including the outer membrane, inner membrane, and thylakoid membrane.

2. **Identifying Photosynthetic Pigments**: The main pigments involved in photosynthesis are chlorophyll-a, chlorophyll-b, carotenes, and xanthophylls. These pigments are crucial for capturing light energy.

3. **Locating the Thylakoid Membrane**: The thylakoid membrane is a system of membranes within the chloroplast that forms flattened sacs called thylakoids. This is where the light-dependent reactions of photosynthesis take place.

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