1. What characterizes an extreme environment?/

An extreme environment is a habitat characterized by harsh environmental conditions, beyond the optimal range for the development of humans, for example, pH 2 or 11, -20*C or 113*C, saturating salt concentrations, high radiation, 200 bars of pressure, among others.

the graph line crosses the x axis at both -6 and -2, so the answer would be the second one.

if i did my math right then the answer should but 108