The first triploblastic phylum is Platehelmenthis
Water has a high specific capacity of heat, so it absorbs the heat on earth w/o a significant rise of temp. in the water. This helps to buffer the temp. on Earth makes it a relatively constant temperature, which is essential for most organisms.
Is there a list to chose from or are you just looking for them all
Yes it is I think tell me if u got it wrong plz
