Online dating Web sites such as eHarmony and Match sift through huge amounts of information to compare millions of people across hundreds of different variables and make matches for users in a matter of minutes, sending new matches out on a daily basis. This is an example of:.

Big data analytics

Explanation:

 The big data analytics is one of the type of concept that helps in understanding the various types of complex set of the data that is used to detecting the various types of hidden information or patterns.

The main objective of the big data analytics is to extracting the various type of useful data elated the market, the preferences of the users and also the various types of benefits based on the applications.

According to the given question, the big data analytics is one of the best example that helps in illustrating the given situations based on the given data processing information.  

 Therefore, Big data analytics is the correct answer.

the correct answer option is b. a single paragraph.

explanation:

when you are thinking about paragraph​ topics, you should always choose a subject that can be adequately addressed in a single paragraph.

a paragraph is a piece of writing consisting of a few sentences that deal with a single theme. it has only a single idea that the paragraph revolves around and talks about.

so a paragraph topic must be chosen wisely where a single idea can be communicated in a single paragraph.