Answer:
Sorry I haven't read this chapter .
Answer:
Osmosis is a special type of diffusion, namely the diffusion of water across a semipermeable membrane .
Answer:
c) requiring vaccination for public school children
Explanation:
Pulse Polio vaccination to eradicate Polio virus from India is the best example. All children are urged to take oral polio vaccine in the country country at regular intervals so that the epidemiological triad of the disease is broken.
This process is very effective as polio virus has a faeco-oral route of transmission.This level of disease prevention is known as primary prevention.
