Which of the following plays an important part in photosynthesis?

The correct answer is A. Chloroplast.

Chloroplasts are organelles found in plant cells that are responsible for photosynthesis. Photosynthesis is the process by which plants use sunlight to convert carbon dioxide and water into glucose and oxygen. Glucose is a type of sugar that plants use for energy. Oxygen is a gas that is released into the atmosphere.

Chloroplasts are green because they contain a green pigment called chlorophyll. Chlorophyll absorbs sunlight and uses the energy to convert carbon dioxide and water into glucose and oxygen.

The other options are incorrect because they are not involved in photosynthesis.

• Centrosomes are organelles found in animal cells that are involved in cell division.
• Tonoplasts are membranes that surround the vacuoles of plant cells.
• Nematoblasts are cells found in cnidarians that are used to capture prey.