____________________ can be constructed to provide support to the ...

[folubunmi]

___________________ _ can be constructed to provide support to the base of a slope. They are
  anchored into bedrock, backfilled with crushed rock, and provided with drain holes to prevent buildup
  of water pressure in the hillside. Fill in the blank(s) with the appropriate word(s).

Question 2

In the ___________________ _ method of protecting slopes, steps are cut into a hillside to reduce the
  overall average slope and catch small landslides or rockfalls. Fill in the blank(s) with the appropriate word(s).

[parker125]

Answer to Question 1

Retaining walls

Answer to Question 2

benching

[folubunmi]

Excellent

[debra928]

Thanks for the timely response, appreciate it