Swimmers should be careful. Shark attacks are rare. Shark attacks can be prevented. Because shark attacks are rare and preventable, swimmers should be careful. Swimmers should be careful, and shark attacks are rare, and attacks can be prevented. Shark attacks are rare, and attacks can be prevented if swimmers are careful. Shark attacks can be prevented when swimmers are careful.

The missing apostrophe is in the 2nd paragraph. it says "youre"it should be "you're" because it is a contraction of two words. it shows the separation between the two, since you're is you are.

Ithink she called him it

1) if the main idea is to show the sequence of events, a cause-and-effect style of writing will be used.  2) if the main idea is to show why one product or idea is better than another, the basic points of each side will be compared and contrasted.  3) if the main idea is to present opposing viewpoints, the pros and cons of each side will be discussed.  4) if the main idea is to draw special attention to an important cause or event, various examples will be provided.  5) if the main idea is to define a certain term or concept, various examples and explanations will be provided.