You do, because they are proper nouns.
Yes, the names of food groups are typically capitalized, such as Protein, Dairy, Fruits, Vegetables, and Grains.
The correct spelling of the name is the same as the religion, Christian.Don't forget to capitalise names.
Yes, "Koala" should be capitalized as it is a proper noun referring to a specific type of animal.
It depends on the context. In general, common fish names are not capitalized unless they include proper nouns or adjectives. For example, "salmon" is typically not capitalized, but "Atlantic salmon" would be capitalized because "Atlantic" is a proper adjective.
in The King ***
No.
No.
yes
No. It's not necessary.
Yes
Yes, "local authorities" should be capitalized when referring to a specific group of governmental bodies responsible for specific areas or regions. For example: "Local authorities in the city have implemented new policies to reduce traffic congestion."
Yes, in writing, you should capitalize the names of books.