Jawaban:

1. cochlear implants allow people who are deaf to hear.

2. temporary artificial hearts for people whoare waiting for transplants

3. prosthetic arms whichcan receive signals from the brain

4. the first replacement hips - from a time when bionics was an idea from science  fiction

5. healthy area of bone where the bionic limb is attached

6 bionic limbs which movement mimics the body's natural steps  

Penjelasan:

RELATIVE PRONOUNS

1) WHO

Digunakan untuk menjabarkan orang (people) dan berfungsi sebagai pengganti posisi subyek.  

Contoh:

The girl who spoke about the boy is standing over there.

The boy, who was angry at his friend, bit his hand.

A 70-year-old man, whose house was recently struck by lightning, said he lost everything.

2) WHICH

Digunakan untuk menjabarkan kata benda dan hewan. Berfungsi pengganti posisi subyek, obyek.

Contoh:

Give me some food which  I may eat.

RELATIVE ADVERB

3) WHERE  

Digunakan untuk memodifikasi tempat/lokasi (city, country, house)

Contoh:

His house where he was born was on fire last night.

Semoga membantu ya.

4) WHEN

Digunakan untuk memodifikasi spesifikasi waktu (time, year, century, day, time, month)

Contoh:

I remember the time when I met you in the airport.

Semoga membantu ya.