The answer is Sensory Neurons
Yes, because the envelope can be a important document- so therefore it can be considered "confidential".
I believe the answer id Cnidaria
Shivering
Explanation: shivering action is an act to warm a homoeothermic body. Sweating makes the body cool, panting don’t keep body warm and dilating blood vessels does not keep body warm instead constriction of blood vessels is the initial process to conserve body heat followed by waves of muscle contraction, which is nothing but shivering. Alteration of the set point in torpor is also not the right answer
The correct answer is D) fern gametophyte bearing only antheridia.
