Answer:
Many fish use swim bladders to help them with quick depth changes. These bladders fill with air to help fish rise or release air so fish can sink, often in conjunction with forward movement. Some fish, however, don't have swim bladders
Explanation:
The answer is B, public goods and services.
Answer:
Families provide for each other as well as carry out and teach a particular culture to other members of the family.
Explanation:
The sociology of the family is the study of families as a central study of social life. A family, according to sociologists, plays an important role in teaching and carrying out cultural values to its members.
<u>The sociologists study the family as they understand that every family possesses some cultural values, that to some extent are similar yet so different from each other. When a couple is married, they bring their own cultural values, that they learned in their families, into their marriage and passing those values to their children</u>.
That is why for sociologists the study of family is important.
E2020 answer is d) <span>It has a high gross domestic product.</span>