Answer:
Sentence #1
Explanation:
Why things wouldn't be capitalized correctly:
-seasons aren't capitalized (eliminates sentence 2)
-months are capitalized (eliminates sentence 3)
-unimportant objects are not capitalized (eliminates sentence 4)
I think that the italicized word is "trained" as it's a participle and there is no other participle or gerund! A participle is a verb form that can be used to modify a noun.
To modify a plural noun that ends in 's' to show possession you should add an apostrophe (') after
the s.
Example: The Johnsons' house is beautiful.
Hope this helps! If you need anymore help or further explanation just let me know!! :)