Which of the following parts of decomposing living organisms are usually not preserved as fossils?
bones
skin and organs
teeth and spines
shells

i wish i could but this one is weird give me abc and i can solve it.

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.