I’ll mark as BRANLIEST

1) Observation: a teenager observed that he had three new pimples the night after eating a chocolate bar.

Question:

Hypothesis:

2) Observation: A mother observed that the plant that she accidentally spilled salt water on was wilted.

Question:

Hypothesis:

3) Observation: A little boy observed the leaves on trees changed colors when the temperature was lower.

Question:

Hypothesis:

See the answer below

Explanation:

In science, research questions are generally derived from the observation of phenomena. Also, hypotheses that represent general statements that have not been tested are formulated in such a way that they can be falsified. Hence, for each of the observations in the illustration, the question and their respective hypothesis would be as follows:

1. Observation: a teenager observed that he had three new pimples the night after eating a chocolate bar.

Question:  Do chocolate bars cause pimples in teenagers?

Hypothesis: If teenagers eat chocolate bars, they might get pimples.

2. See the attached image

3. Observation: A little boy observed the leaves on trees changed colors when the temperature was lower.

Question:  Do lower temperatures cause tree leaves to change color?

Hypothesis: If the ambient temperatures of trees are lowered, their leaves might change color.