If both of them were travelling anti parallel to each other. (parallel but in opposite directions)
Active transport is the process in which substances are absorbed against a concentration gradient, i.e. from a lower to a higher concentration.
Human<span> genus are called Homo they include the past genetic tree of humanity, with Neanderthals, Denisovans, and other extinct species of hominin. I hope this helps you!</span>
Answer: Salt, Soda, Fire Extinguishers
Explanation: