Analyzing motion using Newton's laws

A bird is flying in a straight line towards the left. At

t = 0

, it starts to slow down and sits on a branch at

t = t_{1}

. It stays on that branch thereafter.

Which of these could correctly describe the variation of the net force on the bird from $t = 0$ ‍ to $t_{1}$ ‍?
Note: Assume the bird is traveling in a horizontal line and doesn't move up or down.

Mechanics (Essentials) - Class 11th

Course: Mechanics (Essentials) - Class 11th > Unit 6

Problem