Answer:
B
Step-by-step explanation:
It is a quantitative observation because quantitative data deals with values and numbers like height, weight, body temperature, etc.
The question also states that the biologist determines that the body temperature is 29⁰C, this is classified as an observation.
Hence, the answer is B, because the data is quantitative (as it contains numerical values), and the biologist observed this, most likely through a series of test.