B An ecosystem because it is i dont know how to explain but i think is that one
Reflex action refers to the response to a stimulus, while reflex arch refers to the path taken by the reflex action.
<h3>What is the nervous system? </h3>
1. Low oxygen levels are detected by sensory receptors in the arteries.
2. An impulse is produced by sensory neurons.
3. Certain parts of the brain get an impulse from the central nervous system.
4. Motor neurons carry messages from the brain.
5. Isabel's respiration becomes more rapid.
Reflex actions are immediate, reflexive reactions to stimuli that limit bodily harm.
Therefore, it travels to the brain via the central nervous system and sends impulses via Isabel's motor neurons, which aid to speed up her breathing.
Learn more about neurons, here:
brainly.com/question/12040535
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Answer:
you need to provide more information cause what exactly am i supposed to select from
<span>It could be a supernova.
The Crab Nebula is the remnants of a supernova explosion which was
observed in the year 1054. The star that exploded was 6000 light years
away and it was still a spectacular sight even from that distance.So its A.Let me know if I helped.
Give me brainliest and stars.
:)
</span>
Answer:
D
Explanation:
Bohr determined that there are discrete (unique, different from one another) energy levels in the atom and that electrons will orbit the nucleus within these energy levels, known as orbitals.
