Function of a
tight Junction in animal cell

A tight junction is a watertight seal between two adjacent animal cells, which prevents materials from leaking out of cells.

Explanation:

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.

a- multicellular

b-eukaryotic

c-no cell wall

d-heterotrophic

e-autotrophic