Answer:
A man is at a risk of developing colon cancer because he has a familial history of the disease. Which of the following foods can reduce the risk?
b. steamed broccoli
Explanation:
In order to reduce colon cancer (and many other diseases) everyone should have a helthy diet. This diet should be based on fresh food such as fruit and vegetables. Also it has to include whole grains, legumes, different type of seeds and non fat dairy products. When it comes to meat, we should consume few portions. It is also important to drink water.
Answer:

The exposure may be risk factor.
Explanation:
Given

Required
The odd ratio
First, we calculate the odds of exposure using:

For cases, we have:


For controls, we have:


So, the odds' ratio is:



Conclusion about the odds' ratio
The calculated ratio is greater than (and also far from) 1.
This implies that there is a greater exposure than the controls.
So, we can conclude that the exposure may be risk factor.
Lungs = respiration, provides oxygen to the blood.
heart = arteries, pumps blood.