Aristo Science Workbook 2b Answer- Link

The light intensity increases. Photosynthesis requires light energy. Higher light intensity increases the rate of photosynthesis, producing more oxygen per minute.

The real "answer key" is the scientific method itself. If you use an answer key, do not just transfer the letters. Cover the answer, try the question again 20 minutes later, and see if you can arrive at the same conclusion. Aristo Science Workbook 2b Answer-

Sodium bicarbonate is a weak alkali (base). It neutralizes the acid through a chemical reaction (Neutralization). Water would only dilute the acid but not remove its corrosive properties, potentially spreading it further. The light intensity increases