Answer:
The process of photosynthesis requires direct absorption of sunlight so it needs to be located in the upper part of a leaf.
Explanation:
Chlorophyll is an essential component of photosynthesis in plants. It is found in chloroplasts of the plant. This enables the plant's leaves to take light directly from the sun and consequently processed by the plant together with carbon dioxide and water into sugars. The process is known as photosynthesis.
Hence, given that the process of photosynthesis requires direct absorption of sunlight so ChlorophyII needs to be located in the upper part of a leaf.