reason (n.)
the cause of an event or situation or something that provides an excuse or explanation
youngster (n.)
a young person, usually an older child
realize (v.)
to understand a situation, sometimes suddenly
safety helmet (n.)
a hat created to offer some protection from accidents
pad (n.)
a piece of soft, thick cloth or rubber used to protect a part of the body
coral reef (n.)
an area of coral, the top of which can sometimes be seen just above the sea
a large number of (phr.)
another word for0" many"
in trouble (n)
a situation in which you experience problems or danger
pollution (n.)
damage to water, air, etc. by waste
temperature (n.)
the measure amount of heat in a place or in the body
