Which of the following plant tissue performs photosynthesis?

The correct option is Chlorenchyma.

Explanation:
Photosynthesis is the process by which green plants synthesize their own food using light energy, carbon dioxide, and water. This process requires the pigment chlorophyll, which absorbs light energy.

Let us analyze the functions of the plant tissues provided in the options:

1. Chlorenchyma: This is a specialized form of parenchyma tissue containing abundant chloroplasts (and thus chlorophyll). Because it possesses chlorophyll, its main function is to carry out photosynthesis. It is primarily found in the mesophyll of leaves and green stems.

2. Sclerenchyma: This tissue consists of dead cells with thick, lignified walls. Its primary role is to provide structural support, strength, and rigidity to plant parts, rather than performing photosynthesis.

3. Xylem: This is a complex vascular tissue responsible for the transportation of water and dissolved mineral nutrients from the roots to the rest of the plant.

4. Phloem: This is another vascular tissue that functions to transport soluble organic compounds (food sugars produced during photosynthesis) from the leaves to other parts of the plant.

Therefore, Chlorenchyma is the tissue that performs photosynthesis.