Explanation:

- The sentence in question is about listing the essential elements for a plant's growth.

- In English, when listing multiple items, the verb should agree with the plural subject.

- "Water," "sunlight," and "nutrition from the soil" are the key subjects here.

- When combined, they form a plural subject.

- Therefore, the verb should be in the plural form "are."

Option Analysis:

1. "been" - This is a past participle, inappropriate for this context.

2. "be" - This is an infinitive, incorrect for this structure.

3. "is" - This is a singular present tense verb, doesn't agree with the plural subject.

4. "are" - This is the plural present tense verb, agreeing with the plural subject.