Because weight is depends on our acquired traits.. it's not a herited trait

Continuous variation refers to the variation in a characteristic or trait that can take on any value within a range. In other words, it is a type of variation where there is a gradual and continuous transition from one extreme to another. Continuous variation can be influenced by both genetic and environmental factors.

Among the given options, weight is an example of continuous variation. Here's an explanation of why weight is described as continuous variation:

1. Definition of Continuous Variation:
Continuous variation refers to the range of values that a trait can take on, with no distinct categories or groups. It represents a spectrum or continuum of values. Traits that exhibit continuous variation can be measured on a scale or numerical system.

2. Weight as Continuous Variation:
Weight is a characteristic that can vary continuously within a range. It can take on any value within that range, from very low to very high, without distinct categories or groups. In other words, individuals within a species can have a wide range of weights, with no clear-cut boundaries or specific values that define different groups.

3. Gradual Transition:
Weight can change gradually over time due to various factors such as diet, exercise, and metabolism. It is influenced by a combination of genetic factors and environmental factors, making it a trait that can vary continuously rather than having distinct categories.

4. Measurement and Quantification:
Weight can be measured and quantified using a scale or metric system. It can be expressed in units such as kilograms or pounds, allowing for precise numerical comparisons and calculations.

5. Examples of Weight Variation:
Within a species, individuals can have different weights depending on factors such as age, gender, genetics, and lifestyle. For example, adult males may generally have higher average weights compared to adult females. However, even within these general trends, there is a wide range of individual variation in weight.

In conclusion, weight is described as continuous variation because it can vary continuously within a range, without distinct categories or groups. It can be measured and quantified, and it is influenced by both genetic and environmental factors.