What do you mean by legislature?
Legislature is the organ of government which makes orformulates laws for the smooth runningof the government.
What is bill? How does it become a law?
The proposal or rough draft to be tabled in the parliament to be passed as law by the majority of representatives finding the positive and negative aspects and effects on the people is called bill.
It becomes law whenever the majority of the parliament passes it to be granted as law after the serious check or quest.