Geography Help! Please help I don’t quite understand the question. Thanks!

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.

India's population is made up of percent hindus.

Why is canada's east coast a great fishing area? will name brainliest and 30