Meaning of Viscosity: - To be thick, sticky, and semifluid.
The answer is Peanut butter because, ketchup is almost like a liquid and isn't sticky at all.
On the other hand, Peanut butter is thick and sticky.
Peanut butter is thick, and sticky and can easily be played: shaped. Peanut butter's viscosity would be 250,000 Centipoise.
Ketchup isn't thick, and you definitely can't mold it into anything due to it being a liquid state. Ketchup's viscosity 50,000 Centipoise.
That being said, Peanut butter has a higher viscosity.
I hope this help's!
-LizzyIsTheQueen