Answer:
Simple noun.
Explanation:
A simple noun refers to people and things in general. In this case is refering to the "shore", a place that is common on every place with seaview.
Proper noun are written with capital letter and refer to a particular place, person, or thing.
And finally, a compound noun is a noun that is formed by two or more words.
From the options given the most suitable is simple noun.
I hope this answer helps you.
