Catrina can arrange a group of sticks in order from the shortest to the longest and can insert a stick of an intermediate size into the proper place. this activity specifically demonstrates catrina's achievement in

seriation and transitive inference.

Explanation:

Transitive inference give a person the ability to connect  a relation between things that have not been explicitly compared in their mind beforehand (Such as If A is bigger than B, and B is bigger than C, then  A is definitely bigger than C)   , while seriation give people with the ability to arrange certain objects in chronological order.

The combination of this two allow Catrina to arrange the group of sticks from the shortest to the longest.

- world peace, cause that's important

- iron man to still be alive, cause i cried my eyes out

- for those in starving places like africa to get the support that they need for food and water, cause they r humans and need those basic things go be alive.

this question does't support enough resioning to answer.