During medieval times, which of these groups was granted land by a lord? b. serfs c. vassals d. priests

In which research method does a researcher change the value of one variable to determine how the change affects another variable? a. experiment b. observational research c. survey d. case study

What are the positive and negative aspects of rejection of vote?

Explain the changes that took place in the field of agriculture in india due to the green revolution in the late 1960.