The image is a sign that explains the different types of wetlands and nature's water filters. The sign is rectangular in shape and has a white background with black text. The title of the sign is "Wetlands - Nature's Water Filters" at the top. Below the title, there is an illustration of a wetland with water levels and soil conditions. 

On the left side of the image, there are two illustrations of plants, one with green leaves and the other with red flowers. The plants are shown in a vertical line, with the water level on the top left and the soil conditions on the bottom right. The illustration shows a plant with long, thin leaves and a red flower in the center.

The text on the sign explains that although it is easy for pollinators to get into water, complex physical, chemical, and biological processes, it is important to understand the different levels of water in the wetland. It also mentions that the plant life is low in oxygen and that it is suitable for plants with low oxygen levels.