Final answer:
A loading zone is a restricted space with defined time limits where vehicles can only stop for a short duration, whereas libraries, parks, and open fields generally lack such specific time restrictions.
Step-by-step explanation:
An example of a restricted space with defined time limits is C) Loading zone. A loading zone is typically a designated area where vehicles can park for a short period of time to load or unload goods or passengers. This is in contrast to locations such as a library, park, or open field, which generally do not have strict time-based restrictions for entrance or use.
Unlike other areas, a loading zone has regulations that limit the duration of use to facilitate high turnover and ensure that the space serves its intended purpose effectively. Violating these time restrictions can result in penalties such as fines or towing. These restrictions are an example of how zoning regulations can dictate the usage of space to cater to the various needs of a community.