Search engines generate revenue through pay-per-click (each time a user clicks a link to a retailer’s website); pay-per-call (each time a user clicks a link that takes the user to an online agent waiting for a call); or pay-per-conversion (each time a website visitor is converted to a customer)

pay-per-click (each time a user clicks a link to a retailer’s website).

Explanation:

Pay-per-click is the cost stipulated by online survey platforms for each click on a sponsored ad.

Popularized by Google AdWords, this is one of the most used metrics for digital marketing, mainly because of the ease of having measurable digital advertising efforts.

The great advantages of this metric is the possibility of measuring and monitoring the number of users who will click on your link, making it more effective to analyze the impact that your business media has on people.

i think the answer is a. science center.

it's actually a very difficult task, due to not many people can make 2 million dollars in 2 years. besides that, to the not-so-realistic ideas, you can create a business. it could be practically anything, but make it into a business that isn't that known yet, you get me? also, lets not forget about stock market. that's where all the good stuff happens. use investments at the beginning and begin to raise up your business or whatever you're going to do. as this is a very non-realistic idea, it's still worth the shot!