The second alternative is correct (B).
The economic matrix in force in the world is based on the burning of fossil fuels, mainly petroleum, which releases amounts of CO2 and other gases in the ozone layer.
The acid rain is due to the exaggerated amount of products from the burning of fossil fuels released into the atmosphere. That is, human activities are mainly responsible for this phenomenon of acid rain.
Thus, the change to a clean energy matrix, using solar, wind and other energy, can result in a decrease in the phenomenon of acid rain.
The correct answer is A. Primary group
Explanation:
In sociology, a primary group is a relatively small group such as family or close friends that is characterized by long-term and frequent interaction along with close personal bonds, This group differs from others groups because in primary groups the relationship between individuals endure, also, they involve support, love, concern, etc. while in other types of groups such as secondary groups relationships do not last and are not personal. According to this, it is "primary group" the word that fits with the definition provided.
