Starting at sponges and moving to echinoderms, what happens to the body structures of the invertebrates?

burning of wood and coal

explanation:

the panel also concluded there's a better than 95 percent probability that human-produced greenhouse gases such as carbon dioxide, methane and nitrous oxide have caused much of the observed increase in earth's temperatures over the past 50 years.

this is more of a statement than a question. is there answers to go along with this, or is it opinion based?

i think it's organizational.