The indicator will change the colour of the substance. The first option is the correct one.
What are indicators?
Indicators are solutions that change colours to indicate the state of reactions or the presence of certain substances.
The presence of starch in materials during scientific investigations is tested using iodine solutions as indicators. The iodine atoms in iodine solutions form a complex with the starch molecule. This is indicated by the brown colour of iodine changing to a blue/black colour.
There is no smell, taste, or state that can indicate the presence of starch in substances other than the use of iodine-based solutions as indicators.
More on indicators can be found here: https://brainly.com/question/28093573
#SPJ1
