Select the main idea of the paragraph.

Which sentence does not fit in the paragraph?

1. Cannons nearly always betray an old wreck at the bottom of the ocean 2. There are many kinds of birds 3. Craig nudged me

Main Idea:

The main idea of the paragraph is that cannons at the bottom of the ocean are a clear indication of an old wreck, even after the hull decays and collapses.

Sentence that does not fit:

The sentence "There are many kinds of birds" does not fit in the paragraph because it is not related to the topic of cannons indicating an old wreck at the bottom of the ocean.

Explanation:

The paragraph discusses how cannons are a reliable indicator of an old wreck at the ocean floor due to their straight lines, even when covered with coral. The mention of various kinds of birds and Craig nudging the speaker are unrelated to the main idea of cannons betraying wrecks. Therefore, the sentence "There are many kinds of birds" does not fit within the paragraph context.
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