Final answer:
Amyloplasts are responsible for starch storage, not sugar synthesis, whereas other listed plastids such as chloroplasts, chromoplasts, and elaioplasts are correctly paired with their functions of photosynthesis, pigment storage, and lipid storage, respectively.
Step-by-step explanation:
The plastid and function pairing that is not correct is B. amyloplasts; sugar synthesis.
Amyloplasts are plastids that are involved in the storage of starch, not in its synthesis. Starch is a complex carbohydrate that serves as a storage form of energy in plants and is typically synthesized in chloroplasts during the process of photosynthesis. Amyloplasts are found in non-photosynthetic tissues such as roots and tubers, where they store starch that has been transported from other parts of the plant where it was synthesized.
On the other hand, elaioplasts are associated with lipid storage, chloroplasts are the key organelles involved in photosynthesis, where they convert light energy into chemical energy stored as sugars, and chromoplasts contain pigments that provide distinctive colors to flowers and fruits. Therefore, all the other pairs listed are correctly matched with their functions except for amyloplasts, which do not synthesize sugar but rather store the starch produced elsewhere in the plant.