in The King ***
Yes
yes
No. It's not necessary.
No.
No.
Yes, T-shirt is correct.It is not necessary to capitalise the 't' in t-shirt. It is not a proper noun, but just a common noun. Capitalisation is not necessary even though the t-shirt was so named because it resembles a capital T.
If a person is referring to the monarchy system of government, it isn't necessary to capitalise it. However, if the person is referring to the British Monarchy itself, then it is proper to capitalise it.
You do, because they are proper nouns.
Capitalise the cardinal directions when they are referring to a specific region of a country (eg: Northwest America). Do NOT capitalise if they are used as directions (eg: Looking north...).
Greek Mythology or Greek Myth.
When you are referring to the planet Earth.At the beginning of a sentence.
No, there is no need to capitalise fitness in a sentence.