An episodic illness is the most difficult because the child is in and out of school at various times,                     an example of an episodic illness would beGroup of answer choicesCancer.Asthma.Flu.Measles.

To determine which illness is an example of an episodic illness, we need to understand what "episodic illness" means. An episodic illness is characterized by periods of illness followed by periods of wellness. This means the child may be in and out of school at various times due to the fluctuating nature of the illness.

Let's analyze each option:

1. Cancer: Cancer can have periods of intense treatment and recovery, but it is generally considered a chronic illness rather than episodic because it requires ongoing management and treatment.

2. Asthma: Asthma is a condition that can have episodic flare-ups. A child with asthma may experience periods of good health and then have sudden asthma attacks that require them to miss school.

3. Flu: The flu is typically an acute illness, meaning it comes on suddenly and lasts for a short period. It is not considered episodic because it does not have recurring episodes over a long period.

4. Measles: Measles is also an acute illness. Once a person has measles, they usually recover and do not have recurring episodes of the illness.

Given this analysis, the most appropriate example of an episodic illness from the provided options is:

Asthma.