Answer:
Integration.
Step-by-step explanation:
Integration testing can be defined as a phase in software applications testing, which typically involves the process of testing the interface between two software module combined as a group.
The main purpose of an integration testing is to determine the correctness of this interface and expose any fault existing between integrated modules.
In this scenario, several programmers wrote individual code modules that are used for different processes in a vehicle and individual tests have already been done. Now it is the time to put all of the modules together and test the system as a whole. Therefore, this type of testing is known as integration testing.