The musical movement that started in the mid-1960s on the West Coast was the _____ movement.

A. Folk
B. Rock
C.psychedelic
D. progressive

The musical movement that started in the mid-1960s on the West Coast was the psychedelic movement.

To find the answer to this question, you can use various sources such as music history books, websites, or reference materials. These sources often provide information about different musical movements and their origins. By searching for information about West Coast music in the mid-1960s, you can identify the musical movement that emerged during that time. In this case, the answer is the psychedelic movement.