Which statement highlights a unique role of water in a biological system? Organisms cannot use it to regulate their body temperature.
Few organisms can use it as a living environment.
It does not provide structural support to organisms.
It provides organisms a medium to transport materials.

oh it is true if thats what you are asking

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.