He ate green grapes.
Have should be capitalized if it is the beginning of a sentence. Summer should not be capitalized.
The phrase "Martin Luther King Day" is correctly capitalized. Martin Luther King is a name so is automatically capitalized. Since it is a specific day, a holiday to be exact, day is also capitalized.
Yes, "Local Park" should be capitalized because it is a proper noun.
Yes, "Osprey" should be capitalized because it is the proper name of a specific bird species.
It should only be capitalized if it forms part of a title.
Grapes should be placed in the fridge.
Yes, it should be capitalized.
Yes it should always be capitalized.
Yes it should be capitalized.
As an abbreviation it should be capitalized.
The first 'c' should be capitalized.