3. Next, she went to a region full df mountains. There she saw 532 species of insects, reptiles, and birds. If she saw 253 insect species and 143 bird species, how many reptile species did she see?

To determine how many reptile species she saw, you can subtract the number of insect and bird species from the total number of species observed. **Given:** - Total species observed = 532 - Insect species = 253 - Bird species = 143 **Calculation:** 1. **Add the number of insect and bird species:** \[ 253 \ (\text{insects}) + 143 \ (\text{birds}) = 396 \ (\text{insect and bird species}) \] 2. **Subtract this sum from the total number of species to find the number of reptile species:** \[ 532 \ (\text{total species}) - 396 \ (\text{insect and bird species}) = 136 \ (\text{reptile species}) \] **Answer:** She saw **136 reptile species**.