Think about a good supervisor you’ve had. how did the person act as a teacher, leader, counselor, or advocate?

The good supervisor I've had, was a leader, he emulated an advocate working behaviour. He used the example as a core value, because he wanted us to do an excellent job, and he did it that way too. He was the first arriving and the last one leaving.

It's important to say that a supervisor needs to have a whole skill set to motivate the people he commands, other way it's gonna be a dictatorial supervisor, which carries the worst result to the organisation.

faulty parallelism is a construction in which two or more parts of a sentence are equivalent in meaning but not grammatically similar in form.

the correct version of this faulty parallelism in the sentence is:

the hikers knew that the hike was six miles, that it usually required the entire day, and it would not be wise to start after 10: 00 a.m.

the problem is the last sentence, the first two have a basic subject+verb+object structure.

so, to give a proper balance to the structure, or better said, to give a parallel structure, we must write a basic s+v+o structure in all three sentences:

the hikers knew that the hike was six miles, that it usually required the entire day, and it would not be wise to start after 10: 00 a.m.