How is the author’s purpose in Screen Time Can Mess With the Body’s “Clock” similar to or different from the author’s purpose in Is Our Gain Also Our Loss?

yes the first one is correct .

the use of “as” in the example to draw the resemblance. some more examples of common similes are given below. common examples of simile. our soldiers are as brave as lions. her cheeks are red like a rose. he is as funny as a monkey. the water well was as dry as a bone. he is as cunning as a fox. simile introduces vividness into what we say.