Answer:
B
Explanation:
its upside down but I'm 99% sure
If the number of rats decrease, snakes would look for another prey.
Answer:
Ba
Explanation:
Atomic radius increases going right to left, and up to down.
So the closest element to the bottom left corner is Ba.
The formula unit of compound made up from Pb4+ and oxygen is PbO2.
Answer:
By the vibration of particles in a medium
Explanation:
For example, the energy in sound waves is transferred by the vibration of the molecules in air.
A is wrong. Electromagnetic radiation transfers energy through vibrating electric and magnetic fields.
B is wrong. Sound waves can transfer energy far from the ocean.
C is wrong. A combination of waves just makes a wave with a different shape.