ANSWER
[tex]B)33\text{ farm animals}[/tex]EXPLANATION
We are given that Tyler had 13 plastic animals and each month he collects 4 more.
Let the number of animals be F and the number of months be m.
This means the number of farm animals after m months is:
[tex]\begin{gathered} F=13+4\cdot m \\ F=13+4m \end{gathered}[/tex]To find the number of farm animals after 5 months, find the value of F when m is 5
[tex]\begin{gathered} F=13+4(5) \\ F=13+20 \\ F=33\text{ animals} \end{gathered}[/tex]That is the answer.