Five year old marta draws a picture with pretty lavender, purple, and blue colors intermixed with green, yellow, and brown. its a boat on the ocean at sunset, with whales jumping all around it! she expalins to her teacher. marta is showing clear evidence of: animism, conservation, intuitive thought, sympolic function

I believe the answer is: Symbolic Function/Representation

In psychology, symbolic function/representation is the ability to conveys a certain part of our subconscious mind in a form of objects. This is an extremely important part of child development since it allows them later on to translate the idea/planning into realisation, along with the ability to communicate the idea with other people.