Answer:
I would say the answer is B because they're bigger animals.
B. larger and more complex
Explanation: As the environment became more unpredictable, bigger brains helped our ancestors survive.
Answer: C
Explanation: the application of scientific knowledge for practical purposes, especially in industry
Answer:
The respiratory system and especially the lungs play an important role in maintaining homeostasis in the body. Gas exchange in the lungs is one of the ways that the respiratory system helps maintain homeostasis. This gaseous exchange of oxygen and carbon dioxide takes place in alveolar sacs present in the lungs.
