Assertion: Diversity observed in the entire geographical area is called gamma diversity.
Reason: Biodiversity decreases from high altitude to low altitude.a. If both assertion and reason are true and the reason is the correct explanation of the assertion. b. If both assertion and reason are true but reason is not the correct explanation of the assertion. c. If assertion is true but reason is false. d. If both assertion and reason are false.

Sure, here are some examples of step-by-step solutions in LaTeX: Example 1: Solving a quadratic equation using the quadratic formula Given the quadratic equation $a{x}^2+bx+c=0$, where $a$, $b$, and $c$ are constants, we can solve for $x$ using the quadratic formula: $x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$ To solve the equation, follow these steps: 1. Identify the values of $a$, $b$, and $c$. 2. Substitute these values into the quadratic formula. 3. Simplify the expression inside the square root. 4. Evaluate the two possible values of $x$ by adding and subtracting the square root term from $-b$ and dividing by $2a$. Example 2: Finding the derivative of a function To find the derivative of a function $f(x)$, we can use the following formula: $f^{\prime }(x)={\lim }_{h\to 0}\frac{f(x+h)-f(x)}{h}$ Follow these steps to find the derivative: 1. Rewrite the function $f(x)$ in terms of $x+h$. 2. Subtract the original function $f(x)$ from the rewritten function. 3. Divide the result by $h$. 4. Take the limit of this expression as $h$ approaches 0. Example 3: Solving a system of linear equations To solve a system of linear equations, we can use the following steps: 1. Write the equations in standard form: $ax+by=c$. 2. Choose one of the variables to eliminate by multiplying one or both equations by a constant. 3. Add or subtract the two equations to eliminate the chosen variable. 4. Solve for the remaining variable. 5. Substitute the value of the remaining variable back into one of the original equations and solve for the eliminated variable. 6. Check your solution by plugging it back into both equations and verifying that they are true.