The tundra biome has permafrost
I looked it up and it should be D. Nerve cells :)
I think it differs since the technology used before is kind of analog and the technology used now is kind of upgraded which has a higher storage capacity
The HCG hormone is the answer possibly
Answer: Stimulus is something that causes a reaction, either positive or negative in the body of an organism. Examples includes, HEAT, COLD, PRESSURE, PAIN
Explanation: