Answer:
The answer would be the last one, he is examining the physical characteristics. Why this is correct is because physical characteristics are visible to the naked eye and therefore everything he stated was just that, including color and shape/design
Explanation:
I'm pretty sure it is B. neap tide.
If that is wrong, then it is D. spring tide.
Answer:
The study of oceans and their life.
Explanation:
The study of oceans, including seawater, the ocean floor, and marine plants and animals.
Algae and nitrogen-fixing bacteria are photosynthetic organisms.
