Your mother asks you to carry a load of wood to the fireplace and lower it to the hearth. in doing this you have used your legs as levers. which statement describes this as a class three lever?
question 13 options:

a. the wood was the fulcrum, the load were was the knees, and the effort (input force) was supplied by your legs.

b. the wood was the load, the fulcrum was your knees, and the effort (input force was supplies by your leg muscles.

c. the fulcrum was the muscles in your legs, the load was the wood and the effort (input force) was the knees.

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

meiosis is the first to occur after the nuclei of opposite of opposite mating types fuse

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.

. the sierra madre fault zone of southern california

. the san andreas fault california