Proteins have a function in a. giving form to the cell b. providing stored energy and directing movement within a cell c. providing a scaffold for chemical reactions to take place d. catalyzing chemical reactions within a cell e. all of the above​

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.

it’s lava came from an explosive eruption

sex cells are usually half's then they find another half and make a fertilize egg