The correct answer is the Subject line
The subject line is usually just a very short sentence that presents the problem briefly and straight to the point.
<span>Online learning is impossible without "basic computer literacy." Let us assume that everything is already provide, from computers to electricity. You can not move if at least a single idea about the usage of computer is not there, even the basics like turning on, turning off, browsing, etc.</span>
That is a true statement. Hope this was helpful!