why Hawaii has the most volcanoes?

Answer 1

All of the Hawaiian islands are made of volcanos. Each island consists of one or more volcanos that gradually erupted from the ocean floor.

Answer 2

Although Hawaii is entirely volcanic it does not have the "most volcanoes". There are more volcanoes in Alaska, Washington and Oregon than there are in Hawaii.

Answer 3

The Pacific Plate is moving over a mantle plume or more commonly called a "hot spot". This create prolific volcanism that occurs in chains as the plate slowly moves over the rising magma.