Final answer:
Redis is the data caching service known for its specialization in object caching.
Step-by-step explanation:
The data caching service known for its specialization in object caching is Redis. Redis is an in-memory data structure store that can be used as a cache, database, or message broker. It is capable of storing structured and unstructured data, and it offers advanced features such as distributed caching and replication.
On the other hand, Memcached is a general-purpose distributed memory caching system that is often used for caching web pages, API responses, and other frequently accessed data. While it is widely used for caching, it does not have the same level of specialization in object caching as Redis.
Therefore, the correct answer is A) Redis.