What happens to a series circuit consisting of three light bulbs if a new light bulb is added to the circuit? check all that are true.

resistance decreases
resistance increases
voltage decreases
voltage increases
current decreases

The body is protected against harmful flu viruses by

1. emigration the movement of people from one place to another 2. immigration a situation in which resources are being used up at a faster rate than they can be replenished 3. migration the leaving of one's homeland to settle in a new place 4. overpopulation the movement of people to a new country 5. sustainable development a situation in which the birth rate is not sufficient to replace the existing population 6. underpopulation the ability to meet current needs without reducing the ability to meet future needs 7. unsustainable development the increase in the population of a city 8. urbanization a situation in which the number of people exceeds the available natural resources in an area

What is the problem in this article? what solution does the article propose?