Question

complete the sentence.
nerves carry messages in the form of __________ from one part of the body to another.
oxygen and carbon dioxide
electrical signals
blood
nutrients

Explanation:

Nerves transmit information as electrical signals. Oxygen, carbon dioxide, blood, and nutrients are transported by other systems (respiratory, circulatory), not nerves for messaging. So the correct option is "electrical signals".

Answer:

B. electrical signals (assuming the options are labeled A, B, C, D with A: oxygen and carbon dioxide, B: electrical signals, C: blood, D: nutrients)