Question

how do ants indentify sweets kept in tin

Answer 1

Ants find their food with the help of their smell organ even if the food is kept in a tin or other container then after finding the food they send singnals to the other ants and take away the food

Answer 2

Ants can identify Sweets kept in a tin as they are capable of identifying  Fragments in the air with the help of their Antenna..................