Which of the following is an example of a transform?

In the context of data processing, a transform is any operation that modifies input data in a specific way. The option that describes a transform effectively takes input and processes it into a new format.

Transforming input to lowercase is a clear example of altering the representation of the original data. When a string is passed through the operation, the output will be the same characters but in lowercase form. This functionality is significant in various contexts, such as ensuring uniformity when comparing strings or enforcing specific data formatting rules.

The other choices also represent transformations; however, if the emphasis is on the most straightforward and specific transformation often associated with string manipulation in many programming contexts, converting input to lowercase is a commonly referenced function. It effectively demonstrates the act of transforming data to meet specific criteria or standards.