Explanation
The work breakdown structure (WBS) is a tool used to define the scope of work and to develop estimates. This tool creates a hierarchy of work by decomposing the project scope into smaller and smaller pieces. WBS can perform the following tasks:
It may break the project into iterations, releases, or phases. It can break deliverables into work packages.
It may break activities into smaller tasks.
Answer C is incorrect. The project management plan could be helpful, in some instances, but for this QUESTION the best answer is WBS.
Answer D is incorrect. A Pareto chart is a special type of bar chart where the values being plotted are arranged in descending order. The graph is accompanied by a line graph, which shows the cumulative totals of each category, left to right. The chart is named after Vilfredo Pareto, and its use in quality assurance was popularized by Joseph M. Juran and Kaoru Ishikawa.
Answer A is incorrect. Organizational process assets are elements of historical information, guidelines, processes, and standard procedures within an organization. They mandate certain deliverables and the lessons learned from business analysis activities can be used in the development of business analysis plans.

Explanation
The assessment of capability gaps is a business analysis task to identify new capabilities required in order to meet the business need.
Answer D is incorrect. This is the definition of the business goal.
Answer A is incorrect. This is the definition of a resource skill assessment which may be included as part of the assessment of capability gaps.
Answer B is incorrect. This is a description of root cause analysis.

Explanation
Requirements Classification Schema: identifies levels or types of requirements that assist the business analyst and other stakeholders in categorizing requirements.