Which aspect of nature inspired the invention of velcro

Which of these is most responsible for differences between the twentieth century to the twenty-first century?

What is the digital revolution and how did it change society? what are the benefits of digital media?

Create a class named majors that includes an enumeration for the six majors offered by a college as follows: acc, chem, cis, eng, his, phys. display the enumeration values for the user, then prompt the user to enter a major. display the college division in which the major falls. acc and cis are in the business division, chem and phys are in the science division, and eng and his are in the humanities division. save the file as majors.java.