The answer is A index fossils
I wish you added the diagram but I can tell that the long strings are the spindle fibres.
Exosphere is in the top 600-800km exosphere has a very low amount of gases almost like in outer space.
Termosphere, 80-600km absorbs gamma rays uv rays and rays that damage our healt also know as ionosphere, is the hottest one.
Mesosphere, 50-80km, the temperature here reaches -140 Celsius shooting stars are formed here
Stratosphere, 12-50km produces the mayor part of the atmospheric ozone, some army planes reach this later
Troposphere, thats the source of the mayor part of the gases here in the atmosphere.
Please please if I was useful please mark this as brainlyest
A disturbance would be things like lava, flows, newly formed sand dunes, or rocks left from a retreating glacier. These are disturbances because Primary Successions happen in lifeless areas, which soil is incapable of sustaining life.
