In the pictures I can see young students during schooltime. In the first one, kids are keeping the safe distance and are wearing masks, although in the second one, they are close to each other and perhaps making a project of some kind. Children on the 1. illustration seem bored to me, judging by their expressions. On the second hand, the children from the second pic are much more interested in what they're doing, deeming on the fact all of them are thinking or writing something. If you ask me, I like group projects. During them, I can exchange sentences on a variety of topics with my classmates and it's less dull when I do it with others, not just me. Despite this fact, online lessons, during which we have to work alone, are not bad, I don't think they are less effective than these in class. Sometimes you just have to understand something on your own.
