Answer:
they do not dissolve easily
The right answer is Hashish (<em>Cannabis sativa</em>)
Cannabis is a plant that originates from hemp <em>Cannabis sativa</em>. Modified by many human actions, this plant, after flowering, produces a white substance called tetrahydrocannabinol (THC: delta-9-tetrahydrocannabinol chemical psychotropic).
It is responsible for the psychoactive effects of the plant and therefore gives the status of "narcotic" cannabis. The concentration of THC is very variable depending on how to grow it and where the product comes from.
During a full or new moon, when the Earth, moon and sun align, spring tides form, creating higher and lower than normal tides. During the first- and third-quarter moon phases, when the moon and sun are at right angles to the Earth, neap tides occur, creating low and high tides with minimal difference in heights.