What was the major fear in the cold war ?

The chart shows four articles read by the students in a science class

What is the natural environment? the story of the interaction of people forming societies, cultures, and civilizationsan increase in the world’s temperaturethe process by which social institutions are adopted on a global scalethe natural world in which people, plants, and animals live

How we perceive, use, study, structure, interpret, and react to messages of time is referred to as: ?