Using the batch operations API of AWS SDKs, such as BatchGetItem in the case of Amazon DynamoDB, allows the application to retrieve up to 100 items from one or more DynamoDB tables in a single operation. This reduces the number of network calls compared to individual GetItem requests for each item and results in less network latency. The use of Query or Scan would not be as efficient because they are designed for different purposes. Query is used to retrieve items using a key condition expression, and Scan reads every item in a table, which can be less efficient for frequently accessed individual items. While PutItem is used for data insertion, not retrieval, hence it is not suitable for the scenario given.