Correct answer # 2: The world's nations must cooperate; one nation cannot solve the world's problems by itself.
When you connect two related independent clauses or sentences you use a semicolon. Both sentences should be completed grammarly writtend and with a connection. Make sure you do not write a capital letter after the semicolon, unless it is a proper name.
Answer # 3 is incorrect as there is a capitalized word
Answer # 1 it is incorrect to use "for" as the sentence is grammarly completed
Explanation:
We the people of the USA need to aim on bettering our children's lives by having them eat healthy foods and take partin healthy activities.
Hope it helped.
The horse hooves of rain landed loudly on the tin roof.
The narrator controls what information your reader receives about events in the story and what the characters are thinking.