Which of the following advancements in the music industry has preserved
resources and reduced waste?
o
a. the development of the record
o
b. the development of the radio
o
c. the development of electronic delivery systems
o
d. the development of the phonograph

The development of electronic delivery systems  advancements in the music industry has preserved  resources and reduced waste.

Option C

Music industry is the industry that deals with the production of new music that are soothing to hear, recording them, spreading them in public and so on. This industry is an age old industry which used to record music in different ways in past. Most of them were not that efficient to capture the individual tunes of the music and moreover they used the resources very inefficiently.  

With the advent of modern day electronic delivery systems, the mics came into market, as well as different electronic media like pendrive, CD's, tape recorders, and even internet through which music can be spread among public very easily.  

thats not a question

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.