Guidepost 2: What are the four goals of the scientific study of human development, and what do developmental scientists study? 1  The study of human development seeks to describe, explain, predict, and modify development.  Ways of studying human development are still evolving, making use of advanced technologies.
Dabbling ducks eat plants, seeds, grasses and other small insects and animals that they find on or under the water. Ducks which have broad beaks, (shovelers) sift their food for insects, snails and seeds from the mud.
Something that can be easily hit; someone or something that is in a vulnerable situation. This phrase may come from hunting, where a sitting duck can be an especially easy target. When people go out hunting for food, ducks have the potential to be a prime target. When flying around high in the sky, ducks are not the easiest thing to shoot at. However, some types of ducks, such as the mallard, are known as 'dabbling ducks,' which means they look for food and feed near the surface of water.