Question

Which headings best complete the chart?

O X: Ozone Layer Destruction
Y: Mass Extinction
OX: Long-Term Changes
Y: Short-Term Changes
OX: Short-Term Changes
Y: Long-Term Changes
X: Mass Extinction
Y: Ozone Layer Destruction

Answer 1

X: Ozone layer destructiom

Y: Mass extinction

Answer 2

X: Ozone layer destruction

Y: Mass extinction