yes
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It's an opinion because it is a belief based on the perspective that the government should be involved in stopping the extinction of animals.
Ray and I like bird watching, but he enjoys it more than I
A colon suggests that there will be a list that will follow it. Using the words 'such as', 'for example', and 'including' in a sentence also directs the attention of the reader to a list. It will be redundant to use a colon after the word 'including' in a sentence.
