Recording a change in the color of a substance is an example of collecting data.

Qualitative

Explanation:

Recording a change in the color of a substance is an example of collecting qualitative data.

Data generally refer to information collected or recorded through observations. There are different types of data:

Quantitative data: data that can be quantified/measured. Examples include; height, number of cars, intelligence quotient, etc.Qualitative data: Data that cannot be quantified but categorized or ranked. E. g. beauty, color, etc.

Hence, recording a change in the color of a substance can be classified as collecting qualitative data.

Your answer is c. The tide is smaller than normal because the gravitational forces of the sun and moon pull in