Introduction:
Birds are known for their ability to fly. While most birds can fly to some extent, only a few can fly to great heights. In this question, we are asked to identify the bird that can fly to great heights.

The Answer:
The correct answer is option 'A', Eagle.

Why Eagle can fly to Great Heights?
Eagles are one of the largest and most powerful birds of prey. They have strong wings and a keen sense of sight, which allows them to soar to great heights. Here are some reasons why eagles can fly to great heights:

- Strong wings: Eagles have large and powerful wings that enable them to soar high in the sky. Their wingspan can range from 6 to 7 feet, which gives them the ability to catch and ride the thermals that rise from the ground.

- Keen sense of sight: Eagles have excellent eyesight, which allows them to spot their prey from great distances. They can see up to eight times better than humans, which helps them to spot their prey even from high altitudes.

- Adaptability: Eagles are adaptable birds that can adjust to different environments. They are found in a variety of habitats, from mountains to deserts to forests. This adaptability allows them to fly to different heights and navigate various terrains.

Conclusion:
In conclusion, eagles are the birds that can fly to great heights. Their strong wings, keen sense of sight, and adaptability make them one of the most impressive birds in the world.