Thermoacidophile would likely live near a crack in the deep ocean floor that spews scalding water.
A thermoacidophile is an organism that can grow in strongly acidic environments (with low PH) and high temperatures i.e. it is heat and acid tolerant. Most of thermophiles are bacteria or archaea (especially of the phylum Crenarchaeota and euryarchaeota). Thermoacidophiles can be found in deep sea vents, hot springs and solfataric environments.
From the question, scalding water that is being released from the crack in the deep ocean floor is a very hot, burning water. Hence, thermoacidophiles can stay in such environment because they can tolerate high temperature.
B - They both use protein channels (I think so at least) they differ because active transports use a pump to leave the cell and it uses atp (cell energy).
