I’m not an expert on the field, but based off of process of elimination and what I do know, I’d say b.
He should lower the speed he is going on the steps that way his heart rate won't go up too fast.
A lymphatic organ that helps develop the immune system is the thymus gland.
the answer to this question is Stomata.
Hope this helps! Have a great day.0
Answer:
Cardiac and stratified
Explanation:
Those are the different types of epithelial tissue.
