"How to plant" is the indirect object because it's referring to the main idea without affecting the action.
Whenever repetition is used, it is used to bring attention to the main point, and to make it more memorable in the listener's minds. This makes you remember this phrase more, and makes you more likely to agree with it.
Answer choices or passage needed :)
The snake in the cartoon represents the powerful businessmen. The snake has Monopoly written on the underside. The correct answer is A.