There are different kinds of persons and one type is composed of those who work well alone while other would prefer to work in the group. If the group is large enough so that it is just conducive for learning then, it will be helpful to the dynamics. However, if it is very big that it is no longer healthy then, it would be better to divide further the group.
True because if you watch Percy Jackson you will see that they make tons of mistakes
The present perfect refers to an act that took place in the past, from the perspective of the present. "I have eaten" means that at some point in the past, eating occurred. Now (at the present), it is over.
The simple present tells you about what's going on currently. "I eat" means that the act of eating is ongoing. (Though it can also refer to a habitual act; I may not be eating right at this instant, but it's the sort of thing that I could be doing right now, because the eating isn't complete.)