3) Hedgehog likes mushrooms.
Squirrel is climbing the three.
Squirrel and hedgehog live in the forest.
I like collecting flowers.
Yesterday we went fishing.
4)
1. village
2. meet
3. forest
4. flowers and mushrooms
5. pick
6. climb
7. hedgehog
8. fishing
9. house
5) Where will Lulia pick berries?
When will Stacy write a letter?
Who will play football on Sunday?
Of whom/who will my brother take a pictures in the forest?
тут зависит от того, как тебя учат. Если по новым правилам - то who. По старым там whom в любом случае на вашем уровне это должно быть правильным.