Which word should I use in the sentence below, “economy”, “economic” or “economics”?
“From education to ______, the Internet has sprung up in all aspects in the twentieth century.”
Or should I use “business” instead?
Thanks
I would look closer at the definitions of some words you’re going to use.
‘Economic’ is an adjective, right? ‘Economics’ is the science\branch of knowledge that deals with the production, distribution, and consumption of goods and services. ‘Economy’ is the state of a country in terms of the production and consumption of goods and services and the supply of money.
Which would you use now?
As ‘aspect’ is a particular part or feature of something, I’d expect it to be written ‘in all aspects of life’ or ‘in all fields.’
‘Business’ (=commercial activity) can be used too, but it’s not a substitute for ‘economy\economics\economic’ and can be mentioned separately, eg “From education to ______ to business, Internet has sprung up in all aspects of life in the twentieth century.”
So it’s economy, isn’t it? 
Right.
Remember, it is always “the economy”, so “From education to the economy, …”
I think “From education to business …” would be fine too, though a little different in meaning.