A descriptive investigation usually starts with . A. making a hypothesis B. collecting observations and data C. deciding what information to collect D. seeing what conclusion the data supports

The process is c.convection

The nationalists army held a higher advantage because of the ammount of men in the army. outnumbered them up to 3 over 1.

Large asteroid and comet impacts. because they can have a huge impact on the environment, such as a loss of land, and crust on the earth with the big holes they produce. on the other hand, volcanic eruptions can also cause change within the environment by producing land, but im actually not quite sure which one would be a better answer, hopefully you read this and didnt just flat out choose the first sentence i have spoken! your welcome~