Answer:
Other energy sources which are non-renewable are becoming more and more scarce, such as coal. Due to the lack of such resources, people are looking towards renewable sources of energy such as solar energy.
A sound wave traveling through air is a classic example of a longitudinal wave.
I think the answer may be D.
The substance is pure depending on which atoms bond.
Answer:
age-graded
Explanation:
Age-graded influences are biological and environmental events that influence the dynamic interaction between an individual and their environment at certain ages of the individual’s course of life. They are events that are expected to occur in a particular setting based on chronological age. For example, depending on the cultural settings of an individual, an individual is expected to graduate high school at a certain age, or get married at a certain age. Another example is puberty and menopause which are biological influences that are age-graded.