A food sample was converted into a paste form and then transferred into a test tube. Few drops of copper sulphate and caustic soda were added. The appearance of violet colour shows the presence of which one of the following in the food sample? ​

answer; hypnagogic sensations)

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation:

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.