Identify the organelle present in plant cell that is not there in an animal cell.

The correct answer/option is Plastids.

To understand why this is the correct choice, let us examine the organelles present in plant and animal cells:
1. Plastids: These are double-membrane-bound organelles found in the cells of plants and algae. The most common type of plastid is the chloroplast, which is responsible for photosynthesis (the process of converting light energy into chemical energy). Since animals do not perform photosynthesis, animal cells lack plastids.
2. Nucleus: The nucleus is the control center of the cell containing the genetic material (DNA). It is present in both plant and animal cells, as both are eukaryotic.
3. Neuron: A neuron is not an organelle; rather, it is a specialized type of cell (a nerve cell) found in the nervous system of animals.
4. Cytoplasm: This is the jelly-like fluid that fills the cell and surrounds the organelles. It is a fundamental component present in all living cells, including both plant and animal cells.

Therefore, among the given options, the organelle that is present in plant cells but absent in animal cells is Plastids.