Question

what common techniques attempts to save time and energy by reducing redundant

Answer 1

<<Since the question is incomplete, I am answering based on a similar question and its options given in another website.>>

The answer is reuse of code.

The common technique that attempts to save time and energy by reducing redundant work in object-oriented programming is reuse of code. This involves the reuse of the same code when writing a new program. In other words, parts of a computer program that have been written once are used once again when developing new programs later. One of the best examples of code reuse is a software library.