When one makes a social media post, what happens on other devices with the same app?
an alert appears on the other devices
a request appears on the other devices
nothing
the post appears on the other devices

An alert appears on the other devices

Explanation:

On social media platforms, whenever some one make a post, all the person who are using that social media app and present in the friend circle of that particular person receive an alert containing the information of the post.

The alert that received by different users on a social media platform is known as Notification. This notification is a type of text, in which the activity performed by post creator is mentioned, this text is received with the tone called notification tone.

The purpose of the alert is to informs the friends who are using that social media platform that a post has been published by someone.  

answer; i believe the correct answer is (b) by using a multimeter;