[Q]: Which of the following solutions is better for the following goal:
Are you nervous about giving a speech or doing something? How can you calm yourself?

[A]: Blow gently on your thumb, the vegas nerve is there and it will regulate your heart rate.

[Q]: Which of the following solutions is better for the following goal:
To cut metal rods into two same sizes.

[A]: Use a hacksaw to cut the metal rod at the middle point.

[Q]: Which of the following solutions is better for the following goal:
wax

[A]: protects car finishes

[Q]: Which of the following solutions is better for the following goal:
To mix nutella and cream to make ice cream

[A]:
Mix it in a cold container