The best answer here would be pencil.
Artists use pencil to make sketches and create studies. They then use these sketches and studies to create their final larger piece. They use pencil because it's quick, can be corrected, lightweight and easy to use. Before pencils artists would make charcoal drawings but once we had pencils it made sense to use them as they aren't messy like charcoal.
Answer:
a computer. The advent of technology in all aspect of human life made life simple and easy.The fast processing and error checks makes writing in computer a unique to 20th century. The handwriting never significant here as one can take any font to inscribe the text and the standardization and uniqueness of each characters makes computer typing the best of all writing tools. The features available are enormous that one has different options available in writing in computers.
Explanation:
