A bar chart shows the number and type of resources you need throughout your project is called ?

B - Explanation: The Resource Histogram is a bar chart that shows your staffing needs over time. If you need more testers in the end of the project than you do while you're building a product, for example, you can forecast how many you will need and what their skill level needs to be from the beginning. That way, you'll be sure that they're available when you need them.