"Conspire" means to secretly plan with someone to do something that is usually bad or harmful. For example, if two people were to conspire, they might whisper to each other about a sneak plan to maybe not do their homework and blame it on their imaginary friend. It's important to remember that it's not nice to conspire to do harmful things.
Which of these examples is the odd one out?
The employees can't conspire against the boss, it would be terribly unprofessional
She and her cousin would often conspire to find the best hiding spots during family games of Hide and Seek
I will conspire to help the old lady
The two students seemed to conspire together to prank the teacher on April Fool's Day
The thieves decided to conspire in the darkness, making sure no one could hear their secret plan
