Ithink the answer is a.
which is most challenging for developing countries?
large aging populations economic and employment issues social and environmental issues outsourcing of jobs to nearby areas

Social and environmental issues

Explanation:

Developing economies are middle-income countries that have experienced high rates of economic growth in recent history. The development process is often environmentally burdensome, as countries use many fossil fuels and worryingly increase atmospheric pollution. Moreover, as these countries develop, people gradually overclass and yearn for better living conditions, but inequality is still brutal. The main developing countries are Brazil, Russia, China, India and South Africa.

6 units. ab and lo are congruent sides, and if ab= 6 units, then lo would be the same.

globalization can mean many things

the three main concepts are 1 bushiness

buiness is something thatch part of globalization a lot

which manly gives its name   but there are other actors

another 1 is communication

communication is another bold factor in globalization and wouldn't even exsist without communication

last and third is   goverment and poltics

poltics is a big but small factor it takes part of deciding peoples minds during polticis   and choosing people for the job but sometimes doesn't