It's c because Atoms contain three sub-atomic particles called protons, neutrons and electrons. The protons and neutrons are found in the nucleus at the centre of the atom.
Carbon dioxide increases acidity when dissolved in water e.g. in blood as it reacts with the water to form carbonic acid which has a slightly acidic pH.
C is the answer cause the hormone secreted by adrenal gland known as adrenaline prepare the body to fight or run when you are angry, worried, afraid etc.
Due to natural selection in finding a mate, t<span>he </span>color<span> of the </span>dewlap would start to lighten slightly in order also to <span>adapt to their surroundings.</span>
