We should not allow mosquitoes to breed in our surroundings because they

Fill in the blanks:
$(a)$ Pneumonia is an example of . . . . . . disease.
$(b)$ Many skin diseases are caused by . . . . . . .
$(c)$ Antibiotics commonly block biochemical pathways important for the growth of . . . . . . .
$(d)$ Living organisms carrying the infecting agents from one person to another are called . . . . . . .

Which of the following can make you ill if you come in contact with an infected person?

What are communicable diseases?

Your younger brother observes some mosquitoes sucking juices of cut fruit pieces,though it is common knowledge that mosquitoes suck blood of humans. How will you explain this behaviour to him?

Study the given chart carefully and fill in the blanks $(a)$,$(b)$,and $(c)$:

$S$.No.	Name of the disease	Causative organism	Mode of transmission
$1$. Polio	$(a)$	Infection of virus directly/orally
$2$. $(b)$	Lyssa virus	Virus enters human body with saliva of an infected animal
$3$. Typhoid	Salmonella typhi	$(c)$