What legal principle allows a party to use peremptory challenges against jurors based on age?

The principle that allows a party to use peremptory challenges against jurors without needing to provide a reason is rooted in the entitlement to remove jurors without cause. This legal mechanism grants each party a certain number of peremptory challenges during jury selection, allowing them to dismiss potential jurors they might distrust or prefer not to have on the jury, regardless of whether there is a specific rationale for their decision.

This process is designed to help parties achieve a jury that they feel is more likely to be favorable to their case. While this right has significant implications, it's important to note that it must be exercised within certain legal limits; for example, a party cannot use peremptory challenges in a discriminatory manner based on race or gender as determined by the Supreme Court.

The other principles mentioned, such as the right to a fair trial, the principle of a jury of peers, and protections against age discrimination, do not specifically define the use of peremptory challenges. Rather, they serve broader contexts within which jurors and jury selection operate. Therefore, the correct context for the use of peremptory challenges based on juror characteristics, including age, is indeed the entitlement to remove jurors without cause.