When we say complete subject, this is what is being talked about in the sentence including its modifiers, and the complete predicate includes the main verb and its modifiers as well. In the given sentence above, the complete subject would be "He" and the complete predicate would be "<span>had no help with the project." Hope this helps.</span>
The Author is Strictly telling you that certain animals (Like Dogs, Cats, etc..) Eat meat. Their Ancestors ate meat in the past, and these animals should do the same as well.