Why did IUCN prepare the red data book

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

Which situation is an example of not doing work? lifting a couch throwing a baseball running up stairs carrying a box