How do most canyons form? a. wind deposits sand to form large features called sand dunes. b. rivers gradually build up eroded sediment over millions of years. c. volcanoes repeatedly erupt and build up thick layers of lava. d. rivers cut down through plateaus by weathering and eroding rock.

If anyone who can me with this hw? i would really appreciate it

Sasha has just gotten a new job in a nearby city. after comparison shopping, she found that renting a nice two-bedroom apartment would cost around $800 per month. her utilities would cost about $150 per month. sasha has enough money saved for a down payment, and she found that she can buy a three-bedroom house or condo with a mortgage payment of $1,000 per month, including taxes and homeowner's insurance. her utilities would cost about $200 per month. what is the advantage of buying the house over renting the apartment?

Elements in group viiia (also known as group 18, or the noble gases) have similar properties because they all have a. the same number of electron shells b. full octets c. the same number of valence electrons d. the same number of electrons needed to fill their octet