The core idea
Investors demand compensation when they expect inflation to erode the purchasing power of future nominal bond payments.
What is happening underneath
Higher expected inflation can therefore lift nominal yields even if expected real growth is unchanged.
How investors should read it
The effect is strongest when investors also demand a larger premium for uncertainty about future inflation.
The same market move can carry different information depending on which maturity, issuer and risk premium is changing. Read the question together with the underlying concepts rather than treating one price move as a universal signal.