Which of the following would be considered a quantitative observation a ) the attractiveness of the tail of male peacocks is compared
b ) butterfly wings are assessed to see which is the most orange in appearance
c ) the height of radish seedlings is measured
d ) the odor of different plants is compared to see which smells the worst

c ) the height of radish seedlings is measured

Explanation:

The quantitative observation from the given choices is the height of the radish seedling measured.

Observation is one of the most important steps in the scientific method. It is usually carried out with our six senses. Also, observations can be made with very specialized equipment.

Taking note of color, odor, etc are all qualitative observations.

Quantitative observations are taken for measurements.

its a  

explanation:

individual oxygen atoms are formed during photosynthesis.-c.