The answer is:
A diagram with each part of the bicycle labeled.
Due to the fact that the text deals with a technical procedure such as changing the chain of a bicycle, the writer should reinforce the information including a graphical representation of the different bicycle parts. As a consequence, readers would be provided with a pictorial aid to understand the text better.
The correct answer should be D - Growth.
The tubers, bulbs, and roots of many plants store starch in them. When young plants are growing, they use this starch stored in the bulbs, tubers, etc. by converting them into carbohydrates by various metabolic processes. Once the plant grows the leaves and shoots, they grow by photosynthesis.
Hope this helps!
(Brainliest would be greatly appreciated!)