This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Because the chain has a larger area and hence the pressure exerted by the heavy tank on the ground decreases and prevents the tank from sinking into the ground.
1 5 1
The chain increses the surface area of contact and hence the pressure decreases.
1 5 1