Answer: A and C are the correct answers
Explanation:
The structure of the skin is an effective barrier against bacteria. The multiple layers of epidermis, while can be invaded by foreign organisms, has a high turnover rate which means it is constantly shedding, therefore even the bacteria is shed protecting the body. Lastly, the skin's lipids maintain an acidic pH which slows and stops growth and replication of bacteria.
A compass
The Earth's magnetic field, provided by the magnet in a compass, shows the direction of the north and south poles.
ANSWER MADE BY AN AI
Answer that does not describe the structure of an atom: The electron clod is a small and compacted space around the nucleus.
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