4. Dark Energy.
This is the mysterious force causing the expansion of space. No one has ever seen this force.
(b) Always act on the different bodies in opposite directions
All of the change that living things undergo as they grow is called development. That is the name when the changes are within a single unit and over a period of time as short as a lifetime. When the change occurs over thousands of years then it's called evolution.
Answer:
false
Explanation:
cause bacteria prefers moist and damp environment
The intensity of a sound wave is defined as the amount of energy passing through a unit area of the wave front in unit of time.
