Two of the fundamental developmental questions that researchers have addressed include how nature differs from nurture. This is because of how our environment affects our genetics. The second problem is that continuity differs from discontinuity. Continuity is a fluid process that is not interrupted unlike discontinuity. The biophysical framework includes biological forces that are genetic. Chromosomes are formed by structures inside cells, and cells contain strands of genes. Genes produce everything the body needs. The heredity of children is influenced by the environment in which they grow up, because a child can be born naturally secure and the environment can eventually make him insecure. Temperament is personality and includes traits of ease, difficulty, or slowness. These traits can change as the child grows, depending on how the parent handles each aspect. By around nine months of age, a child should be able to express all basic emotions. They can show fear, happiness and even sadness. Complex movement is the ability to show guilt or pride that develops in a surrounding child....