being a carry simply means you have decent last hitting (which is quite easy given that most carries are built to last hit easier) and also know when to go in and pull back from wars, calculating risks.
but being a support, you really need to have SUPERB last hitting (when you are alone in the lane / help carry deny creeps / pulling creep camps), then you really must now when and how to go in a war - positioning, timing, dying for carry, etc. There are a lot more to supports - warding, dewarding, getting suitable items (ward or mek? ) and a lot a lot more. Then you always kena flame when your carry can't farm properly or when your mid so chiong diving towers etc 

apa yg konpius sgt. meh aku tolong

mas = station monkey
amein = darai
rag = hg_runt
gajah = sadis
edi = panadol
awan = gitar
carb = nora
cliff = pandan

dari taruk gambar atas phone nampak macam kek lapis

ok la tu

critical vision tu apa