so; therefore; accordingly; then
A conjunction used to introduce a natural consequence, decision, or next action based on the preceding context. Common in both spoken and written Japanese.
雨が降ってきた。そこで、傘をさした。
It started raining. So I opened my umbrella.
彼は遅刻した。そこで、会議は延期になった。
He was late. Therefore, the meeting was postponed.
従って is a formal, written 'therefore' used in logical arguments, while そこで is used more broadly in narrative to mark a resulting action.