Overall transformation : Ar-H to Ar-R
Named after Friedel and Crafts who discovered the reaction in 1877.
Reagent : normally the alkyl halide (e.g. R-Br or R-Cl) with aluminum trichloride, AlCl3, a Lewis acid catalyst.
The AlCl3 enhances the electrophilicity of the alkyl halide by complexing with the halide.
Electrophilic species : the carbocation (i.e. R +) formed by the "removal" of the halide by the Lewis acid catalyst
The reactive electrophile, the carbocation is prone to rearrangement to a more stable carbocation which will then undergo the alkylation reaction.

Friedel-Crafts reactions are limited to arenes as or more reactive than mono-halobenzenes
Other Lewis acids such as BF3, FeCl3 or ZnCl2 can also be used
Other sources of carbocations can also be used:
from loss of water from alcohols treated with acid such as H2SO4
from the protonation of alkenes by acid such as H2SO4
Alkylation products can also be obtained by the reduction of Friedel-Crafts acylation products
It means that society's that are non-industrial rely one one another to survive and thrive in a village setting. Everyone help each other when needed, and that makes the whole village thrive.
Hope my answer helped u :)
It wouldn't be a smile because there is no 'like or as' and it wouldn't be a onomatopoeia because it doesn't demonstrate sound, it wouldn't be a metaphor because theirs an and, it would be a metonymy.
Answer:
Outside
Explanation:
It is like bread so the crust of the earth is the outside
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