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
The cellar is full of water because the pump is broken
Well behaviors are completely "involuntary" and reflect people's true states. Most people will only attempt to control their nonverbal behavior when they are lying.
Explanation:
list of these:
Spring: 4 February–5 May.
Summer: 6 May–7 August.
Autumn: 8 August–6 November.
Winter: 7 November–3 February.