Question

an example of an objective observation is... \the crystals are a quarter of an inch in length\. \the crystals make me feel happy\. \the crystals are so pretty\. \the crystals are yellow like a sunrise\

Explanation:

Objective observations are factual and not influenced by personal feelings or opinions. "The crystals are a quarter of an inch in length" is a factual measurement. Statements about feelings ("make me feel happy"), opinions ("so pretty"), or subjective comparisons ("yellow like a sunrise") are subjective.

Answer:

"the crystals are a quarter of an inch in length"