What is the term for various positive and negative factors such as lack of shelter, fertile farmland, or an abundance of natural resources that cause a group of people to either leave their homeland and
be drawn to another region?
O push-pull factors
drawing and retracting factors
O pro and con factors
O positive and negative factors

map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground. for example, on a 1: 100000 scale map, 1cm on the map equals 1km on the ground.

the correct answer is:   the domino theory states that if one country in a region came under the influence of communism, then the surrounding countries would follow in a domino effect.