"The usual responses to threat and uncertainty (fight-or-flight) that you have just learned about sit on a continuum with more distressing thoughts, behaviors, and emotional states associated with mental health conditions." I don't understand what this is trying to say, as I'm confused about the "sit on a continuum" part. I'm not a native speaker; so, certain phrases are difficult for me to understand! Help is appreciated. Thank you.

Which statements describe resources? one of the factors people use when deciding where they will live is the availability of resources. renewable resources have little value for people. resources are unevenly distributed throughout the world. energy is the world resource which has the highest use. the use of nonrenewable resources has decreased in recent history. the use of resources is evenly distributed throughout the world. the world's oil supply will last for the next forty years if its use continues as expected.