Your sentences are very clear and mostly correct! Here's a slightly improved version with some small changes for better grammar and clarity:
Original text:
Many birds live in the city. They make nests under bridges, roofs and eaves of tall buildings. In winter, people hang bird feeders full of seeds on windows and trees to give birds food and keep them strong.
Improved version:
Many birds live in the city. They make nests under bridges, on roofs, and in the eaves of tall buildings. In winter, people hang bird feeders full of seeds on windows and trees to give the birds food and keep them strong.
Explanation:
- Added commas to separate the list items: 'under bridges, on roofs, and in the eaves.' This helps the sentence flow better.
- Added the preposition 'on' for roofs and 'in' for eaves because we say 'nests on roofs' and 'in the eaves.'
- Added 'the' before 'birds' in the last sentence to indicate specific birds being fed.
Great job writing about birds and how people help them!