Answer:
I think A but I might be wrong good luck
Let me try: an example of a scientific question that can be investigated with an experiments is "at what temperature does iron melt"?Questions in physics ans chemistry are easily tested with experiments. an example of a scientific question that cannot be (I think) investigated with an experiments is "how does neuron activaton lead to us having the perception of free will"?Questions connected to human mind on a more general lever are not as easily tested with experiments: they need models rather than this.
There would be no energy.
Mitochondria break down food and convert it to ATP for the body to use.
If mitochondria were absent, eating food would be useless, it would not provide nutrition.
The function of the PNS (Peripheral Nervous System) is to connect the CNS (Central Nervous System) to the limbs and organs, basically serving as a communication center going back and forth between the spinal cord, the brain, and the rest of the body.
I honestly think that it would be D. Not 100% sure but it just makes sense