Answer:
- Claim
- Evidence.
Step-by-step explanation:
An argumentative essay is demonstrated as the essay that includes both the claims and counterclaims affiliated with an issue and produce sufficient evidence to refute the counterclaim and substantiate the validity of the claim.
As per the question, the most significant elements of an argumentative essay would be the 'claim' and 'evidence' as the former(claim) is associated with the central idea or argument of the essay that proposes direction and content to the essay while the latter(evidence) is affiliated with substantiating or validating the 'claim' or 'central idea' of the essay that helps conclude the essay. Thus, these two are the essentials of a strong and effective argumentative essay.