How does democracy enhance dignity and …

a) In a democratic country people have the freedom to choose their representatives on the basis of universal adult franchise. 

b) Most societies across the world were historically male dominated. Equal treatment of women became the necessary requirement of a democratic society. Thus, their status in democratic countries improved. 
c) In a non-democratic setup, there is no legal basis for freedom and dignity of individuals. Democracy in India has strengthened the claims of the disadvantaged and discriminated castes for equal status and equal opportunity.  d) Democracy transforms people from the status of subjects under a king or a dictator to the status of citizens with rights and duties.
Many Fundamental rights are granted to citizens in a democratic country. One such right is the right to freedom, which is a cluster of many rights like freedom to travel anywhere, freedom to assemble anywhere, freedom to choose any profession, to choose any religion etc.