Answer:
D is the correct answer
Explanation:
when an organism develops immunity to a disease
The word i would use is <span>ignoramus.</span>
The difference between ratio and proportion can be drawn clearly on the following grounds: Ratio is defined as the comparison of sizes of two quantities of the same unit. Proportion, on the other hand, refers to the equality of two ratios. The ratio is an expression while proportion is an equation which can be solved.
Ask specific questions not broad ones and don't go web-surfing, focus on one topic at a time.