Read the three sentences below. Then, combine the sentences into a compound-complex sentence. Swimmers should be careful. Shark attacks are rare. Shark attacks can be prevented.

Shark attacks can be prevented, because although shark attacks are rare, swimmers should be careful.

Explanation:

A compound-complex sentence is one of the lost complicated types of sentences because they contain at least two independent clauses and a dependent clause.

Therefore, the above given simple sentences have been joined to form the compound-complex sentence below, "Shark attacks can be prevented, because although shark attacks are rare, swimmers should be careful."

Hellen Keller was born in 1880. She was an American writer and lecturer. She was deaf and blind. Hellen was educated by Anne Mansfield Sullivan,  the one who taught her to communicate by using sings. She became a famous author and the first blind-deaf person to have a college degree and such amount of prizes and recognition. She died at the age of 88 in 1968.