ANSWER
The arrow will be shifted to the right (OPTION B)
EXPLANATION:
Firstly, we need to write out the chemical reaction equation
[tex]N_{2(g)}+3H_{2(g)}\text{ }\rightleftarrows2NH_{3(g)}\text{ + heat}[/tex]
From the reaction above, you will see that heat is one of the products, this means that the reaction is n exothermic reaction.
An exothermic reaction is a type of reaction in which heat is released to its surroundings.
In an exothermic reaction, a decrease in temperature will shift the equilibrium to the right
