To solve this problem, we need to identify which plant species flowers only once in its lifetime. This is a characteristic of certain plant species known as monocarpic plants.$\newline$Let's analyze each option:$\newline \bullet$Mango:$\newline$ - Mango trees are polycarpic, meaning they flower and fruit multiple times throughout their life.$\newline \bullet$Jackfruit:$\newline$ - Jackfruit trees are also polycarpic, producing flowers and fruits multiple times.$\newline \bullet$Bamboo species:$\newline$ - Many bamboo species are monocarpic, meaning they flower only once in their lifetime, often after several years, and then die.$\newline$ - This is a well-known characteristic of bamboo, making it the correct answer.$\newline \bullet$Papaya:$\newline$ - Papaya plants are polycarpic, as they can flower and fruit multiple times over their lifespan.$\newline$Therefore, the correct option is Option 3: Bamboo species, as they are known to flower only once in their lifetime.