Avoiding wordiness & redundancy

The sentence below is an example of a

"The energetic pre-school teacher asked the students to circle around the room."

What word/s should be removed to correct the redundant sentence below?

"The police reached the scene of the accident and began the investigation."

Which word is unnecessary in the sentence?

The dead corpse was found in the church yard.

I, personally will not be attending the match

Which sentence is written correctly?

Which word can be removed? The house is rectangular in shape

What is the best way to write this sentence. When we were all gathered and assembled together, we boarded the bus

Correct this sentence:

There are many species and types of birds that are all different

Which word/s should remain in this sentence? This task should be done by each of you individually.

What happens to the reader when writers use redundancy and wordiness