Which strategy combines various memory techniques for better retention?

The correct answer is the strategy that focuses on breaking down complex information into smaller, more manageable units, making it easier to remember. Chunking involves grouping individual pieces of information together, which enhances memory retention by reducing cognitive load. For example, it is often used in remembering phone numbers or lists, where groups of numbers or items are clustered, allowing the brain to encode and retrieve the information more efficiently.

Elaboration, while a helpful technique, involves adding additional details or meaning to information to aid memory rather than combining different techniques. Rehearsal refers to the process of repeatedly practicing information to solidify it in memory, but it doesn't specifically involve using diverse techniques. Mnemonics are memory aids that use associations, acronyms, or rhymes, which can be effective, but they are not a combination of various techniques in the way that chunking is. Therefore, chunking stands out as the strategy that specifically emphasizes organizing multiple pieces of data together to enhance retention.