What is the process in which large hydrocarbons are converted into smaller hydrocarbons, which provide better fuel? a. combustion c. smelting b. cracking d. turbination

Chicken pox and hepatitis are bacterial diseases. true or false?

In many humans, exposing the skin to sunlight over prolonged periods of time results in the production of more pigment by the skin cells (tanning). this change in skin color provides evidence that -

Many organizations release indexes used to measure the development of the world's countries. as we learned in this lesson, these indexes measure many factors, from life expectancy to happiness. in your opinion, what are the three most important factors we can use to determine how developed a country might be? explain your answers in a few sentences.