Calculate the birth rate if there were 50 deer in a forest last year and through reproduction, 10 new deer were added this year.

0.2 offspring per deer per year

The correct answer is Option  (3) -0.2 offspring per deer per year

To calculate the birth rate, you need to find the average number of offspring produced per deer per year. You can do this by dividing the total number of new deers added this year by the number of deers in the garden last year:

Birth Rate = (Number of New deers ) / (Number of deers Last Year)

Birth Rate =10 / 50

Birth Rate = 0.2

So, the birth rate is 0.2 offspring per deer per year, which corresponds to option (3): "0.2 offspring per deer per year."