Problem: What happens next in this paragraph?

How to simulate acid rain
Gather the necessary materials.
This experiment simulates the emission of harmful gases into the environment that combine with water in the sky to lower the ph and cause acid rain. To perform this simulation, you will need an eyedropper, distilled water, a glass jar with a lid, bromothymol blue, a small clear container, and sulfur-based matches.
A: Choose safety matches, which contain more sulfur and less phosphorus than other types. Adult supervision is recommended while using the matches.

Problem: What happens next in this paragraph?

How to treat diabetic retinopathy
Find out how serious your diabetic retinopathy is.
There are four stages of diabetic retinopathy, with the first being the least severe and the fourth being the most severe. When you visit your optometrist, tell them that you have diabetes.
A: They can perform a basic dilated eye exam. They may refer you to a more specialized eye doctor, an ophthalmologist, who can let you know how serious your condition is.

Problem: What happens next in this paragraph?

Several people are seen running down the road around a bull with some holding sticks in their hands. the people
A: crowd around the bull waving sticks and follow the bull around as he gets angry.

Problem: What happens next in this paragraph?

How to take care of ducks
House your ducks in a secure pen.
Ducks require a safe structure to live in. An enclosure or pen will keep them from wandering (or flying) away from your house and allow them a measure of safety.
A:
You can erect a suitable enclosure using chicken wire or another fencing material. If the ducks will be spending their days in this pen, it should provide 1.5 square meters (16 square feet) of space per duck.