How does democracy produce an accountable and responsive government?

Answer: Accountable government means that the government follows all due procedures to take the decision such that in a democracy we can say that constitution is the ultimate source of power. 
Responsive government means in the law-making process or anything that government does, the public can participate directly or indirectly. Hence Government tries to have all the quick policies to work for the welfare of the public in the democracy hence it is responsive.