Im bored can someone give me a hug no h0m0 intended

Seed plants that lived during the carboniferous impact life on earth today because a. they are the ancestors of all plant life on earth. b. their remains formed coal, which is an important resource. c. they produced fossils that are used to date many geologic events. d. their presence caused oxygen levels to drop, allowing animals to evolve.

How many time zone are there on earth

The blue segment below is a diameter of oo. what is the length of the radius of the circle?