Which of these is an agent of chemical weathering

All of the options listed in a previous response are agents of chemical weathering. They are:

1. Water: Water can dissolve minerals and facilitate chemical reactions that break down rocks and minerals over time.
2. Oxygen: Oxygen in the air can react with certain minerals, causing them to oxidize and weaken.
3. Acids: Acids, such as carbonic acid in rainwater, can dissolve minerals in rocks and accelerate their weathering.
4. Carbon dioxide: Carbon dioxide in the air can dissolve in water to form carbonic acid, which can then react with rocks and minerals.
5. Living organisms: Certain plants and organisms produce organic acids that can break down rocks and minerals.
6. Acid rain: Rainwater that is more acidic than usual due to air pollution can accelerate the chemical weathering of rocks and minerals.
7. Heat: High temperatures can speed up chemical reactions, including those involved in the weathering of rocks and minerals.

These agents can act individually or in combination to cause chemical weathering and contribute to the breakdown of rocks and minerals over time.