The correct answer is: B. 7
The global temperature has risen by about 7 degrees Celsius, since the peak of last glacialisation. This is a significant increase, and it is having a major impact on the planet.
The rise in global temperature is caused by the emission of greenhouse gases, such as carbon dioxide, into the atmosphere. These gases trap heat, which causes the planet to warm. The warming of the planet is causing a number of changes, including:
- Rising sea levels: As the planet warms, the ice caps and glaciers are melting, causing sea levels to rise. This is inundating coastal areas and displacing people.
- More extreme weather events: The warming of the planet is making extreme weather events, such as hurricanes, floods, and droughts, more common and more severe. These events are causing widespread damage and loss of life.
- Changes in plant and animal life: The warming of the planet is causing changes in plant and animal life. Some species are moving to new areas in order to find suitable habitats. Others are facing extinction.
The rise in global temperature is a serious problem, and it is important to take action to address it. We need to reduce our emissions of greenhouse gases, and we need to invest in renewable energy sources. We also need to adapt to the changes that are already happening.
The other options are:
- A. 10: This is too high. The global temperature has not risen by 10 degrees Celsius, since the peak of last glacialisation.
- C. 8: This is too high. The global temperature has not risen by 8 degrees Celsius, since the peak of last glacialisation.
- D. 5: This is too low. The global temperature has risen by about 7 degrees Celsius, since the peak of last glacialisation.