Answer:
36 m.
Step-by-step explanation:
We are asked to find the final elevation of a bird that stats at 20 m and changes 16 m.
[tex]\text{Bird's final elevation}=\text{Bird's initial level}+\text{Change in bird's elevation}[/tex]
Since the bird's initial elevation is 20 m and it changed 16 m in positive direction, so bird's final elevation will be:
[tex]\text{Bird's final elevation}=\text{20 m}+\text{16 m}[/tex]
[tex]\text{Bird's final elevation}=\text{36 m}[/tex]
Therefore, bird's final elevation will be 36 m.