The green Profit/Loss profile corresponds to a long spot position.
The red profile corresponds to a long futures position (identical capital exposure)
The yellow line corresponds to a long call position. (identical capital exposure)
The table on the previous page shows clearly the leverage effect of using options or futures instead of a spot position. The long call position, although being the one with the smallest absolute profit for an index value of 500, would allow you to make the highest profits in terms of percentage of the initial investment.
The option and futures positions account for the highest profits but also for the biggest losses in terms of percentage of the initial investment.