A Bronze Duke of Edinburgh's programme has 4 sections: Volunteering, Physical, Skills and Expedition. You need be at least 14 years old to start a Bronze programme and you must do a minimum of 3 months activity for each of the Volunteering, Physical and Skills sections, and plan, train for and undertake a 2 day (1 night) Expedition.
You also have to spend an extra three months on one of the Volunteering,
Physical or Skills sections. It's your choice which one and, though you can change your mind later, you should decide which section you want to do for longer at the beginning. Knowing how long you're going to do it for will help you to set your aims for the sections.