What does a temperature-controlled soldering station do that a cheap fixed-temperature iron cannot?

Select one answer.

• It sets and holds a chosen tip temperature, adding power to recover the heat a joint draws away, so the tip stays at the right temperature and joints form cleanly.
• It reaches a far higher maximum temperature, which is what makes joints better.
• It never needs a tip and solders without one.
• It removes the need for any solder or flux.