Make the water in the river flow towards the plants. These make the plants grow into trees and the pirates will have enough water to sail back into the ocean.

Click the blocks of sand so that the water could flow without any hindrance. By doing this, you can get rid of the evil pirates for they will be sent back to the ocean.

Click to remove the sand tiles and allow the water to flow into the dried fields. Make sure that all of the fields get properly supplied with water.