1. To collect data from two websites with different URLs using a single Google Analytics property, what feature must be set up?

Answer:Cross domain tracking

Explanation: Cross domain tracking is the tracking activity of the several domains in the Google Analytics property's single unit. This tool works for tracking by the means of debugging and finding solution of the problem.

Cross tracking is also seen as the complex task and the solution is not east to obtain. This tools comes into action when domain session need the tracking of two or more domains or sub-domains.