Question

fff: anisotropy
use the information below to answer the question.
things created with fused filament fabrication (fff) are inherently stronger in one
direction than in another. the term for this anisotropy. things parallel to the print bed
(the xy axis) are stronger than those that are perpendicular to it (the z axis). a good
example of something that is anisotropic is timber. it is much easier to split wood
going with the grain rather than going across it.
with fff, layer adhesion is based on the printer calibration and operating parameters.
this is set by the person operating the printer. when designing a functional piece, the
user should identify which direction it is being printed to take advantage of the
technology. stresses build up in the valleys between each layer as well. layers are
weak in the z axis. a user can optimize the print by having two parts. a strong axis
nested against a weaker one will support the part.
which of the following is true about things parallel to the
print bed for fused filament fabrication (fff)?
they will have a high amount of shrinkage.
they will be weaker than things perpendicular to the print bed.
they will have the weakest structure.
they will be stronger than things perpendicular to the print bed.

Explanation:

The text states that things parallel to the FFF print bed (XY axis) are stronger than those perpendicular to it (Z axis). This directly supports the correct option.

Answer:

They will be stronger than things perpendicular to the print bed.