Tdma and cdma are methods of a. transmitting binary, digital, compressed data. b. allowing cell phone calls to switch between cells. c. sending cell phone locations to local towers. d. converting sound information into electricity.

The correct answer is:A. transmitting binary, digital, compressed data.
TDMA and CDMA are methods or digital techniques that supply communications services to multiple users in a single-bandwidth wired or wireless medium. 
These allow multiple users to share these limited channels to give the economy of scale necessary for a successful communications business. 

TDMA and CDMA are methods of A. transmitting binary, digital, compressed data. These are terms in  order to be read especially in computer world where binary are really useful. CDMA means Code-Division Multiple Access while TDMA means Time-division multiple access.

Ascenario where we impact the environment is when humans/ us litter outside or in the ocean which causes wild life to die or even extinct and also if we keep cutting down our trees we might not even have oxygen to live humans also keep limiting water resources wasting it s