Who invented the phonograph and improved the light filament

Thomas Edison

Explanation:

In his 84 years, Thomas Edison acquired a record number of 1,093 patents (singly or jointly) and was the driving force behind such innovations as the phonograph, the incandescent light bulb and one of the earliest motion picture cameras. He also created the world's first industrial research laboratory.

answer; i believe that the correct answer is (d); // supercontinent

answer; collective security;