Final answer:
Gravitational microlensing can lead to the amplification of distant light.
Step-by-step explanation:
A possible consequence of gravitational microlensing is: d) Amplification of distant light. Gravitational microlensing occurs when the gravitational field of a massive object, such as a star or a planet, acts as a lens, bending and focusing the light from a more distant background object. This phenomenon is a consequence of Einstein's theory of general relativity. As the foreground object moves relative to the line of sight between the observer and the background object, it causes a temporary increase in brightness of the background object. Gravitational microlensing has been employed as a valuable tool in astrophysics, enabling the detection of otherwise faint or distant objects, including exoplanets and dark matter. The amplified light from the background source provides information about the lensing object's mass and distribution, contributing to our understanding of the cosmos.