Assertion (A) : The Mediterranean orchid Ophrys uses sexual deceit to get pollinated by a species of bee.

Reason (R) : The female bee changes its color depending on the temperature of the area.

The correct option is: Assertion (A) is true, but Reason (R) is false.

Step-by-step Explanation:

1. Analysis of Assertion (A):
The Mediterranean orchid Ophrys employs a fascinating pollination strategy known as sexual deceit. One petal of its flower bears an uncanny resemblance to the female of a specific species of bee in terms of size, color, markings, and even scent. The male bee is attracted to this petal, perceiving it as a female, and attempts to mate with it (a process called pseudocopulation). During this interaction, pollen dusts onto the bee's body. When the same bee is attracted by another Ophrys flower, it transfers the pollen, thereby pollinating the flower. Therefore, Assertion (A) is biologically correct and true.

2. Analysis of Reason (R):
The reason states that the female bee changes its color depending on the temperature of the area. This is scientifically incorrect. The female bee does not change its color based on environmental temperature; rather, the orchid flower has evolved to mimic the static, specific physical characteristics (like appearance and pheromones) of the female bee to trick the male bee. Thus, Reason (R) is false.

Conclusion:
Since Assertion (A) is true but Reason (R) is false, the statement matches the third option perfectly.