Which one of the following plots represents $f(x)=-\frac{|x|}{x}$, where $x$ is a non-zero real number?

Note: The figures shown are representative.

Identify the option that has the most appropriate sequence such that a coherent paragraph is formed:

P. Over time, such adaptations lead to significant evolutionary changes with the potential to shape the development of new species.

Q. In natural world, organisms constantly adapt to their environments in response to challenges and opportunities.

R. This process of adaptation is driven by the principle of natural selection, where favorable traits increase an organism's chances of survival and reproduction.

S. As environments change, organisms that can adapt their behavior, structure and physiology to such changes are more likely to survive.

A stick of length one meter is broken at two locations at distances of $b_1$ and $b_2$ from the origin (0), as shown in the figure. Note that 0<b $b_2<1$. Which one of the following is NOT a necessary condition for forming a triangle using the three pieces?

$$ \text { Note: All lengths are in meter. The figure shown is representative. } $$

Eight students (P, Q, R, S, T, U, V, and W) are playing musical chairs. The figure indicates their order of position at the start of the game. They play the game by moving forward in a circle in the clockwise direction.

After the $1^{\text {st }}$ round, $4^{\text {th }}$ student behind P leaves the game. After $2^{\text {nd }}$ round, $5^{\text {th }}$ student behind Q leaves the game. After $3^{\text {rd }}$ round, $3^{\text {rd }}$ student behind V leaves the game. After $4^{\text {th }}$ round, $4^{\text {th }}$ student behind $U$ leaves the game. Who all are left in the game after the $4^{\text {th }}$ round?

Note: The figure shown is representative.