Colons introduce or define something. like "we need: food, water, and wood for our camping trip."
oohhh i know what semicolons do they separate things
like saying "We needed three things; we were about to go camping."
subordinating conjunctions provide a necessary transition between two ideas in a sentence.
"humans are stupid, aliens have taken over the world. they have destroyed earth now we must repair it. We are tired, after picking up all that trash. so we all took a nap and were no longer tired. demolished everything, the aliens wanted a clean slate."