What is a conductor? is added to rubber to make it hard. carbon , hydrogen and sulfur

this is science

Which of the following may have influenced neumatic notation? a. ancient roman music b. muslim chant notation c. hindu chant notation d. byzantine

This is just a little thing i just did for fun! hope you enjoy! a: ~what would you first grand if your house was onfire? b: ~what do you first notice on a person? c: ~ what are some challenges you think the next generation will face? d: ~what is the most embarrassing moment in life? e: ~what is your favorite artists? //music//f: ~what are some bad habits you can't stop doing? , but you know you need to stop on them.i really hope you had fun doing this, or not doesn't matter, but if you want more from me contact me! bye now//i can't wait to see some results//ㅋㅋㅋㅋㅋ나를 따라라! ^^(i'm going to put this under arts, even though it's not, so yeah)

What computer software program was used to create the design for the structure above? what is the main advantage to this program?