Final answer:
Attorneys can use two main challenges to exclude jurors: a challenge for cause which requires a valid reason for exclusion, and a peremptory challenge that doesn't require a reason but can't be based on race, gender, or ethnicity.
Step-by-step explanation:
Attorneys can use two types of challenges to exclude potential jurors that they believe may not be able to impartially decide a case. The first is a challenge for cause, where an attorney must provide a valid reason for the disqualification of a juror, such as the juror's inability to be fair, impartial, or free from a potential conflict of interest. The second type of challenge is a peremptory challenge, which allows attorneys to reject a certain number of potential jurors without stating a reason, although they cannot exclude jurors solely based on race, gender, or ethnicity due to Equal Protection under the law.