Biology - Photosynthesis and Respiration - Aerobic vs anaerobic respiration - Why Do Muscles Burn During Exercise?

Q1: 'During a sprint, your muscles hurt and 'burn'. Why?' (They switch to anaerobic respiration which produces lactic acid / They're on fire / They need more food). Q2: 'Aerobic means ___' (With oxygen / Without oxygen / With food). Q3: 'Yeast makes bread rise and beer fizzy through ___' (Anaerobic