As you can see in the picture presented below, the three classes of water have distinctive traits.
Pure substances contain only one element, they are not mixtures of different things.
The homogeneous mixtures have multiple elements, but they are so well blended together that you can't easily observe or separate them.
In heterogeneous mixtures, we can easily differentiate between different elements of the mixture.
Answer:
D
Explanation:
seismographs detect waves and vibration undergroud
An impulse relayed along a myelinated axon jumps from node of Ranvier to node of Ranvier.