What is fortitude and how does it ?

Fortitude is basically your courage. It helps you became brave and get over your fears and those sorts of things in your future life.

Fortitude is a measure of your resistance to the Weather, Torpor, and Disease. A higher Fortitude increases your natural Hypothermic and Hyperthermic insulation, and lessens the effects that you receive from Hypothermia and Hyperthermia.
please mark mine as the brainlest answer

Okay, biology isn't exactly my strongest subject (it never has been), but i'm pretty sure the answer is nucleotides. dna is made up of nucleotides. each nucleotide contains a phosphate group, a sugar group, and a nitrogen base. there are four different nitrogen bases: adenine (a), thymine (t), guanine (g), and cytosine (c). a always pairs with t, and g always pairs with c.