Answer:
To communicate with each other
Explanation:
Cows use sound (mooing) to communicate with each other and their environment. Cows are herd animals and have complex social structures. Mooing is one way that they interact and how they express their emotions
What are you making a hypothesis for
Answer:
moving arrow
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The atomic mass would not change since the mass of an electron is negligible compared to the mass of protons and neutrons
