Can you make my answers sound more better by changing few words? and do my answers make sense?

1. What does a learner do?
learner learns about variety of different things and became more knowledgeable.

2. what does a communicator do?

communicator conveys information, ideas and gives an important message to public.

3. What does a problem solver do?

problem solver solves different types of problems from big issues to small ones with their wide range of knowledge.

4. What does a community member do?

A community member takes an active part in community.

What else should i write to make it more better and specific?

Thanks :)

Most of your word choices are fine, but if you copied these sentences, you need to put these ideas in YOUR own words.

1. became should be becomes

3. I'd leave out the last words -- with their wide range of knowledge.

You can also give an example for each of these.

Of course, you also need appropriate capitalization and punctuation.