What the difference between 'head' and 'be in charge'
What the difference between 'head' and 'be in charge'?and how to use them respectively?Thanks.He has a lot of responsibility. He ____ a group of 20 people.
It's not easy to ___ of an entire company. There are so many people to think about.
Could anyone please give a detail explanation .Thanks.

Question

What the difference between 'head' and 'be in charge'
What the difference between 'head' and 'be in charge'?and how to use them respectively?Thanks.He has a lot of responsibility. He ____  a group of 20 people.
It's not easy to ___ of an entire company. There are so many people to think about.
Could anyone please give a detail explanation .Thanks.

Answer

He has a lot of responsibility. He "is in charge of" a group of 20 people.
It's not easy to "be the head" of an entire company. There are so many people to think about.

The degree of responsibility is the difference in the sentences you gave.

Answer

No difference, they are both in charge of something

Answer

They are similar in meaning, but to me "to head" implies that you are still a member of whatever thing it is you're heading, whereas "in charge of" is more of a managerial capacity. I'd say the latter is a bit stronger and implies more of a supervisory role, but there really isn't that much difference.