Telecommunication is the transmission of signs, signals, messages, words, writings, images and sounds or information of any nature by wire, radio, 
That's pretty cool, I really don't know much about that.
exchange of information between communication participants includes the use of technology.
That makes sense otherwise they couldn't communicate at all through those means.
Information and communication technologies for development (ICT4D) refers to the application of information and communication technologies 
I really didn't know that but that is quite cool to know! What else can you tell me?
What do you also know about communication? Any hint?
Not a whole lot honestly, but you seem to know tons!