Bonjour !
1. b. We need to limit urbanisation so that we can preserve natural habitat.
2. d. We need to reduce the use of detergent so that we can limit water pollution.
3. a. We need to walk or cycle so that we can reduce gas emission.
4. c. We need to plant flowers so that we can provide food for insects.
J'espère t'avoir aidé. Bon courage !
