4.01 Nature of ADA Claim and Defense is a legal term related to the Americans with Disabilities Act (ADA). It is used in cases where an individual has made a claim under the ADA and the defendant responds with a defense. The claim is made when an individual believes they have been discriminated against based on their disability, and the defense is the response from the accused party. The two main types of 4.01 Nature of ADA Claim and Defense are (1) disparate treatment and (2) reasonable accommodation. Disparate treatment claims involve an individual being treated differently due to their disability, while reasonable accommodation claims involve an individual seeking modifications to a work environment that will enable them to better perform their job duties. In addition, the 4.01 Nature of ADA Claim and Defense can also include claims of failure to provide reasonable accommodations, failure to engage in the interactive process, and retaliation for exercising ADA rights. Each of these claims requires the plaintiff to prove that the defendant’s actions were discriminatory and that they were responsible for the discrimination. The defendant is then responsible for providing an affirmative defense to these claims.