The letter "C" can be pronounced differently depending on the letter that follows it. When "C" is followed by the vowels "a", "o", or "u", it is pronounced as a hard "K" sound, like in the English word "cat". However, when "C" is followed by the vowels "e" or "i", it is pronounced as a soft "S" sound, like in the English word "cent".
"a", "o", or "u" --- Make the English sound "K"
comida: food
como: like
acuario: aquarium
cosas: things
corto: short
"e" or "i" Make the English sound "S"
ciudad: city
centro:center
ciencias: science
a veces: some times
cerca: close
opciones: options
conciertos: concerts