Question

what are the effect of reducing the voting age from 21yeras to 18years????

Answer 1

voting age is a minimum age established by law that a person must attain before they become eligible to vote in a public election. Today, the most common voting age is 18 years; however, voting ages as low as 16 and as high as 25 currently exist (see list below). Most countries have set a minimum voting age, often set in their constitution. In a number of countries voting is compulsory for those eligible to vote, while in most it is optional.
When the right to vote was being established in democracies, the voting age was generally set at 21 or higher. In the 1970s many countries reduced the voting age to 18. The debate is ongoing in a number of countries on proposals to reduce the voting age to or below 18.

Answer 2

Explanation:

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In the 1960s and 1970s there was a debate concerning a possible change in the voting age from 20 or 21 to 18, and most countries concluded that debate by lowering the voting age. In the past decade-and-a-half, a number of countries have discussed a further reform that would give voting rights to 16-year-olds. A few countries, such as Austria, have decided to lower the voting age to 16, and others, such as Estonia, are in the process of implementing a similar change