I'm, sorry but in order for someone to answer, we need more information.
The answer to question 2 is C. Make an inference to connect you thesis. The answer to 3 is B. To find the central idea, you look at the details in the text: what characters say and do,... I don't know what number 1 is I got it wrong but I know it's not C
Erosional land forms such as valley's and canyons. Or depositional land forms such as floodplains, alluvial fans, and deltas.