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.
Butterfly food. Butterflies can eat anything that can dissolve in water. They mostly feed on nectar from flowers but also eat tree sap, dung, pollen, or rotting fruit. They are attracted to sodium found in salt and sweat. This is why they sometimes even land on people in Butterfly Parks.