Which change would be most useful to record through a drawing?

Correct answer: Daily change in the shape of a seedling

The direct answer is A: daily change in the shape of a seedling. Drawings are especially useful for showing visible form, structure, arrangement, and how these change over time. A labelled drawing made on successive days can show the seedling’s developing stem, leaves, direction of growth, and overall shape. Option A is correct because shape and structure are visual features that a drawing can record directly. Option B, water temperature, is best recorded with a thermometer and a numerical value such as degrees Celsius; a drawing would not give a reliable temperature. Option C, mass, should be measured with a balance and recorded in grams or another suitable unit, not estimated from a picture. Option D, experiment duration, should be recorded using dates, times, or a clock; a drawing does not measure duration. For a useful scientific drawing, include the date, use clear lines, label important parts, and keep the relative form as accurate as possible. Memory cue: draw what you need to see; measure what needs a number.