Into what four castes was hindu society clearly divided?

I think it is

1. Brahmin: the seers, the reflective ones, the priests.

a. The intellectual and spiritual leaders.

b. In our society, they would correspond to the philosophers, religious leaders, and teachers.

2. Kshatriyas--(pronounced something like "kshot ree yahs") the born administrators (formerly nobles, rajahs, and warriors).

a. The protectors of society.

b. In our society, the politicians, police, and the military.

3. Vaisyas: (pronounced something like "vy sy us") the producers, the craftsmen, artisans, farmers.

a. The skillful producers of material things.

b. In our society, the merchants.

4. Shudras--(pronounced something like "shoo drrahs") the unskilled laborers or laboring class.

a. The followers or the maintenance people.

b. The so-called menial workers or hard laborers.

for why it was for independence

the correct answer is b, "fertility rates are increasing, so populations will grow more quickly in the future."