In general, greetings are not capitalized in a sentence, but when used as salutations in email greetings they are capitalized. You do have the option of only capitalizing the first word in the phrase of a salutation, but the choice is ultimately up to you.
Chapter 545: Like I said at the beginning of this opinion/theory, Lucy takes a lot longer to comprehend her feelings for Natsu, which is why I believe that she only realises that she is in love with him in the final chapter.
What do all protists have in common? They have a nucleus and other complex organelles. They lack some characteristics that prevent them from being classified as plants,animals, or fungi.