Given the radius of a balloon vine seed capsule and fitness of bugs with different beak lengths under natural selection, what beak length would be ideal for feeding on balloon vine fruits?

9mm

Explanation:

The balloon vine is a plant that presents its flowers in a special shape that looks like an inflated and slightly curved balloon. This type of flower ends up generating thefts and seeds in a format that can make it difficult to feed birds and insects that do not have a beak adapted to the morphology of this plant. It is necessary that the insects have a 9mm beak or they will not be able to have full access to the necessary seeds for their feeding. Insects that have smaller or larger beaks will lose this power source, representing the evolutionary process managed by natural selection.