Growth, population size, population studies, population vital statistics
I don't know your options, but here are some opinion makers:
-media, including TV, specific TV programs, interviews and movies, newspapers, including journals and daily newspapers, radio and internet
-authorities, such as researches and university professors
The escalator was important because during the 1890’s the huge buildings with 20 floors was incredibly difficult for people to walk up on on a daily basis so it was important that they found a solution to that problem
Answer:
Braille is a system that uses combinations of raised dots to spell letters and numbers. It's used by people who are blind or partially sighted to help them read and write. Braille is not actually a language — it's a system of writing. Braille is a system of touch reading and writing for blind persons in which raised dots represent the letters of the alphabet. It also contains equivalents for punctuation marks and provides symbols to show letter groupings. Braille is read by moving the hand or hands from left to right along each line.
