Well assuming that you are implying a coding tag,
Img src is the tag that you use to show a picture
Image Source
This is all i can answer without a photo.
Answer:
to keep the audience engaged
Explanation:
One major reason a writer would decide to choose descriptive words and details is to keep the audience engaged.
Descriptive words are those words that are used to give greater detail about something and writers use this technique in order to have a clear thesis statement.
Therefore, it is necessary to use descriptive words to keep the audience engaged so their attention would not wander.
Yes. Virtually anything can be the theme of an essay, as long as you can find enough information about it to write enough paragraphs to be considered an essay.