Answer: Colonial organisms are the result of many identical individuals joining together to form a colony. These cells are partly dependent on each other to start with. But, later evolutionary events resulted in the obligatory relationships among them resulted in multicellularity.
Diaphragm...is the muscle that helps in respiration.....there are also some other but....you said flat so diaphragm !
The type of soil that has the least amount of space between the particles is clay.
They could discover which organisms are closely related to the mammoth, and which one is the most closely related.