The correct answer is 4.Synagogues
Coronary heart disease is one of the leading health risks in developed countries. Heart disease is caused by several prevalent factors in developed countries such as high levels of stress, obesity, lack of physical activity, smoking and high blood pressure. Coronary heart disease is a leading cause of death in many countries.
Sure what is it that u need help with
Answer:
naturalistic observation
Explanation:
In naturalistic observation, researchers will gather data by directly observing the subjects in their natural habitat without making any intervention.
This is what Professor Ober is doing.
Professor Ober wants to collect a data about development of their physical skills among children. This means that the <u>children are his research subjects.</u>
To collect his data, professor Ober observed the children in the playground (which is the children's natural habitat). He also did not told the children to do anything , he just quietly observe and let the children do what they usually do. (not making any intervention)