Pls help: Pluto was once classified as a planet. However, scientists no longer classify Pluto as a planet. Which is a likely reason for this change?

The original hypothesis about Pluto was supported.
No observations of Pluto were made in the past.
Several planets in outer space were found to be similar to Pluto.
There were significant changes in scientific knowledge about planets.

Which of the following factors is not used to measure a country’s standard of living? a.) life expectancy b.)educational levels c.)divorce rates d.) gross income

What is the difference between the cultures of central asia and the caucasus region? the majority of people in central asia are muslim; the majority in the caucasus region are christian. the primary language in central asia is armenian; the primary language in the caucasus region is russian. central asia has been plagued by ethnic unrest; the caucasus region has had little ethnic conflict. the effects of soviet rule can still be seen in central asia; the caucasus region has developed its own identity since the fall of the ussr.

Suggest 3 different reasons why there is an ageing population in the uk .