Which of the following types of control takes place after completing an action? Feedforward control Feedback control Concurrent control Preventive control

feed back control

Explanation:

Communication in control is very important, and for you to ascertain that a control process is successful,is by having a good feedback, it is not all times that we get a positive feedback but feedback is what completes the process of control, without feedback we can't know if the process failed or not, so feedback is very important that is why after controlling a process , a feedback occurs to ascertain if the control process was completed.

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.