For equality when voting and everyone can feel its fair!! so noone feels as if they where cheated out of a law or something
The correct answer is d. hunting -gathering.
Hunting and gathering was already existing before this : in fact the neolithic revolution was going away from this lifestyle and starting farming and domestication of animals.
Answer: Institutional Revolutionary Party (PRI), Spanish Partido Revolucionario Institucional, Mexican political party that dominated the country’s political institutions from its founding in 1929 until the end of the 20th century. Virtually all important figures in Mexican national and local politics belonged to the party, because the nomination of its candidate to a public office was almost always tantamount to election. Originally called the National Revolutionary Party (Partido Revolucionario Nacional), the party was renamed the Mexican Revolutionary Party (Partido de la Revolución Mexicana) in 1938 and took its current name, Institutional Revolutionary Party (Partido Revolucionario Institucional; PRI), in 1946.
Explanation:
Its an environment that changes easily
