Which occurs just before a volcanic eruption? Lava flows onto the sides of the volcano.
The expanding gases push magma through the pipe.
A pocket of magma forms beneath the volcano.
New rocks are formed as lava hardens.

advantage of using stem cells in medical research:

1.       it provides medical benefits in the fields of therapeutic cloning and regenerative medicine.

2. it provides great potential for discovering treatments and cures to a variety of diseases including parkinson disease, spinal cord injuries, diabetes, alzheimer’s disease and many more.

3. limbs and organ could be grown in lab from stem cells and then used in transplant or treat illness.

there’s no image attached but i can if you want: )