Question

One of the benefits of fitness walking is that it is low impact which ______ stress on the joints.

Answer 1

Hello,

The answer is option B "decreases".

Reason:

The answer is option B because fitness walking relieves stress on the joints so the answer is option B.

If you need anymore help feel free to ask me!

Hope this helps!

~Nonportrit

Answer 2

Decreases is your answer. One of the benefits of fitness walking is that it is low impact which decreases stress on the joints. 
I hope I helped!