An organism $A$, which cannot move from one place to another, makes a simple food $B$ from the substances $C$ and $D$ available in the environment. This food is made in the presence of a green-coloured substance $E$ present in organs $F$ in the presence of light energy in a process called $G$. Some of the simple food $B$ also gets converted into a complex food $H$ for storage purposes. The food $H$ gives a blue-black colour with dilute iodine solution.
$(a)$ What are $(i)$ organism $A$, (ii) food $B$, and (iii) food $H$?
$(b)$ What are $C$ and $D$?
$(c)$ Name $(i)$ green-coloured substance $E$, and (ii) organ $F$.
$(d)$ What is the process $G$?

(N/A) Step $1$: Identify the organism and process. Since the organism cannot move and performs a process using light to make food, it is a plant and the process is photosynthesis.
Step $2$: Identify the substances. Photosynthesis uses $CO_2$ $(C)$ and $H_2O$ $(D)$ to produce glucose $(B)$.
Step $3$: Identify the storage form. Glucose is stored as starch $(H)$, which turns blue-black with iodine.
Step $4$: Identify the pigment and site. The green pigment is chlorophyll $(E)$ found in leaves $(F)$.
$(a)$ $(i)$ Organism $A$ is a green plant, (ii) Food $B$ is glucose, (iii) Food $H$ is starch.
$(b)$ $C$ is carbon dioxide and $D$ is water.
$(c)$ $(i)$ Green-coloured substance $E$ is chlorophyll, (ii) Organ $F$ is a leaf.
$(d)$ Process $G$ is photosynthesis.