Final answer:
Nondeclarative memories, which are implicit and not part of conscious awareness, are evident in tasks and preserve the circumstances in which they were learned.
Step-by-step explanation:
Nondeclarative memories preserve the circumstances in which they are learned. These types of memories, also known as implicit memories, are not part of our conscious awareness but are evident in our performance of tasks. Unlike declarative memory, which involves memories of facts and events that we can consciously recall, nondeclarative memory includes procedural skills, priming, and emotional conditioning.
Implicit memories are stored after automatic processing and through different systems such as procedural memory, which involves the knowing of 'how' to perform tasks. For example, the improved skills in riding a bicycle over time come from implicit procedural memory. This memory type is a testament to the body's ability to remember actions and skills rather than just facts or events.
An example of how nondeclarative memories preserve the circumstances in which they were learned can be seen in procedural memory - the skill of riding a bike is often learned in childhood, and the associated movements and balance become embedded in our memory, often without conscious effort to recall the learning process each time we cycle.