Acharacter who doesn't change during the story. sometimes referred to as a "flat" character.

Static character.

Explanation:

There are different types of characterization in writing fictions. A writer or reader of any fictional work will encounter various types of characters in the story, some more active and prominent than the others.

While all characters have their own places in the story, the 'flat' characters or more simply 'static' characters are those types of characters that don't undergo any change throughout the whole story. They may appear in more than one scene, and may also interact with the other characters, even having dialogues in the story. But they are just a 'sub' for the whole story. They remain unchanged, and they don't serve any purpose for the story. They have no contribution as such to be considered for the progress of the story, but may be included in it. He / she will appear on a need basis, and has no part in the overall development of the story.

invention of the washing machine

in the past, people used sticks and stones or scrub boards to clean their clothing. as it was sweaty, backbreaking work, we owe a world of to james king because he created the model for the modern washing machine in 1851. the most important issue was that this machine cleaned clothes while a person cranked the handle. doing this made people who used it develop strong muscles in their arms. later, in 1908, alva j. fisher created an electric washing machine named thor. this one was not the first automatic washing machine. however, it was one of the most popular models at the time.

the whisper is the answer, hope this : )