Sequence the following tasks as they are taken up while developing the concept 'measurement'
I. Learners use standard units to measure length.
II. Learners use non-standard units to measure length.
III. Learners verify objects using simple observation.
IV. Learners understant the relationship between metric units.

Options

A. IV, I, III, II
B. I, II, IV, III
C. II, I, III, IV
D. III, II, I, IV

Answer

To sequence the tasks involved in developing the concept of 'measurement', we can follow these steps:

1. **Learners verify objects using simple observation.**
- This is the foundational step where learners begin to understand the concept of measurement by observing and identifying objects. It sets the stage for further exploration of measurement.

2. **Learners use non-standard units to measure length.**
- After observation, learners often start measuring using non-standard units (like hands, feet, or blocks). This helps them grasp the idea of measurement without the constraints of standardized units.

3. **Learners use standard units to measure length.**
- Once learners are comfortable with non-standard units, they transition to using standard units (like centimeters or inches). This step is crucial as it introduces them to universally accepted measurement systems.

4. **Learners understand the relationship between metric units.**
- Finally, learners explore the relationships between different metric units (like millimeters, centimeters, and meters). This deepens their understanding of measurement and how various units relate to one another.

### Final Sequence:
1. III. Learners verify objects using simple observation.
2. II. Learners use non-standard units to measure length.
3. I. Learners use standard units to measure length.
4. IV. Learners understand the relationship between metric units.