The simplest multicellular animals that have only a few different cell types are Sponges
Simple multicellular organisms include filaments, clusters, balls, or sheets of cells that arise via mi- totic division from a single progenitor; differentiation of somatic and reproductive cells is common, but more complex patterns of differentiation are not.
Multicellular organisms are made up of several cells, with cell groupings developing to perform specific tasks. Early in a person's development, cells in the body begin to differentiate into distinct types of cells, including blood, skin, muscle, and nerve cells.
Learn more about Multicellular organisms here:
https://brainly.com/question/14193203
#SPJ4