He atoms surrounding an edge dislocation experience what kind(s) of strain(s)?

An edge dislocation of atoms experience tensil, shear and compressive strains. Moreover, tensile strain produce a direct stresses and compressive strain produce in a body when two equal and opposite forces try to compress the body. Meanwhile, shear strain is produce under a shear stress where the body displace transversely from its original position.  

the answer to your question is b

i'm guessing this is from edg enuity so the answers would be, from top to bottom,

theodor schwann

matthias schleiden

robert hooke

rudolph virchow

anton van leeuwenhoek