Iam a teenager and i am 14 years old. recently i have been feeling both light headed and dizzy. it mostly affects me in the night. what could be some potential causes for this?

Which of the following processes within viral replication is the greatest source of genetic variation in rna virus populations? a) high mutation rate due to lack of proofreading of rna genome replication errors. b) transcription from the host cell rna polymerase introduces numerous mutations. c) capsid proteins from the host cell can replace the viral capsid. d) viral rna is translated by host cell ribosomes.