What is the key feature of a contract of adhesion?

A contract of adhesion is characterized primarily by standardized terms set by one party, typically the stronger party, without room for negotiation by the other party. This is why the key feature is indeed the standardized terms. Such contracts are commonly found in insurance, consumer goods, and services where the provider presents a take-it-or-leave-it offer to the consumer. The essence of a contract of adhesion lies in its non-negotiable nature, which means the terms are usually drafted before the consumer even sees them, reflecting a significant imbalance in bargaining power.

In contrast, other aspects of the options do not correctly define the unique nature of a contract of adhesion. Negotiation being optional does not capture the fundamental characteristic that one party has already set the terms without inviting dialogue. Equal bargaining power simply does not exist in these contracts, as the defining feature is the significant disparity in power between the parties. Lastly, while some contracts may include renewal options, this element is not a defining characteristic of adhesion contracts themselves; rather, it can appear in various contract types and is not unique to adhesional agreements. Therefore, the focus on standardized terms distinctly highlights the essence of a contract of adhesion.