Type of chocolate bar, size of it, surface it is placed on, etc
Controlled variables are anything that stay the same for both trials
Answer: to study genetics
<span>What is the most likely effect that a war might have a food security?
A. Crops would be burned and convoys attacked to deny food sources to the enemy
During war time, everything is done to ensure victory. Food and water of the enemies are either confiscated or burned down. Enemies will be starving and dehydrated making them susceptible to sickness or death. Decreasing there numbers and making it easier to defeat them in battle. </span>