Which transitions show the correct relationships? Global Warming and Its Causes

Global warming is a result of an increase in greenhouse gases. Greenhouse gases are released into the atmosphere
deforestation and combustion of fossil fuels.
Deforestation is a major contributor to global warming. Forests help to maintain the levels of oxygen in the air that make it possible for us to survive.
, there has been a surge in the levels of carbon dioxide in the air
the depletion of vast stretches of forests.
, other factors, such as the release of CFCs from refrigerators and pollutants from industries into the atmosphere, are also responsible for global warming.

ich statement best shows a problem in travels with charley?

one sharp difficulty presented itself. in the intervening twenty-five years my name had become reasonably well known.

this being so, my trip demanded that i leave my name and my identity at home.

i had to go alone and i had to be self-contained, a kind of casual turtle carrying his house on his back.

with all this in mind i wrote to the head office of a great corporation which manufactures trucks.

there are several different forms of presenting this; each has a very specific format. plays have a very simple format; teleplays, for television shows, or screenplays, for movies, have more complex and strict rules for formatting.

drama

the first of these to be written for the express purpose of being performed were created by the greeks. many of our modern terms derive from greek origins.

comedy

in the greek sense, a play that doesn't end in death. in modern usage, refers to a play that is humorous.

tragedy

in the greek sense, a play that ends with the death of at least one of the main characters. in modern usage, refers to a play that doesn't have a happy ending.