Which kingdom includes multicellular eukaryotic organisms that are heterotrophic and have the ability to move?

The correct answer is the kingdom that includes multicellular eukaryotic organisms that are heterotrophic and have the ability to move is Animalia. This kingdom is characterized by organisms that derive their energy by consuming organic matter, meaning they are heterotrophic. Unlike plants, which are autotrophic and produce their own energy through photosynthesis, members of the Animalia kingdom rely on other organisms for food.

Moreover, one of the defining features of many animals is their ability to move at some stage of their life cycle. This characteristic distinguishes them from other kingdoms, such as Fungi and Plantae, where organisms generally do not have the ability to move as actively. Fungi are primarily decomposers and have a non-motile form, while Plantae are stationary organisms that conduct photosynthesis.

Although some members of the Protista kingdom can exhibit movement, typically through flagella or cilia, this group comprises a wide variety of unicellular and some multicellular organisms and does not primarily represent the multicellular, heterotrophic lifestyle found in Animalia. Therefore, Animalia is the most fitting choice for the question's criteria.