Which stage best represents the developing of documents that provides the basis for acquiring the resources and for developing a requirements document? Design
Implementation
Planning
Development

The answer to this question is given below in the explanation section.

Explanation:

The correct answer to this question is the planning stage. Because the planning stage represents the development of documents that provide the basis for acquiring the resources and for developing the requirement document. at this stage, you plan about what you are going to develop and how to develop it. At this stage, you come out mainly with two documents i.e. project proposal and requirement document.

Other options are not correct because:

In the project management, after planning, you will start designing the product, and after designing you start developing the product, and at the implementation stage, you implement or deploy the product to the customer or to the client. The requirement document that is developed at the planning stage can be used in the later stages of the project.