This is the excretory system
Answer:
A, C and D
Explanation:
It creates no ionic bonds because it would need certain changes to it.
Im not so sure about E because the configurations are very similar.
And A seems to make sense because its essential to life itself.
Regardless of the tools they use, scientists conduct modern ecological research using three basic approaches:
• observing
• experimenting
• modeling
All of these approaches rely on the application of scientific methods to guide ecological inquiry.
That is the corrext answer
