Question

The eco systems have been home ( 1) ( by , to, from ) our ancestors . They have

been part ( 2 ) (for , of, in ) it and have contributed to what it ( 3 ) ( are, is , were )

today. The huge trees that we see around were planted ( 4 ) ( for , by, through )

previous generations.​

Answer 1

Answer:

1. by

2. of

3. is

4. by

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