Football
Basketball
Swimming
Sailing
Athletics
100
The person who plays football
is a footballer
100
The person who plays basketball
Who is a basketballer?
100
The person who swims
Who is a swimmer?
100
The person who sails
Who is a sailor?
100
The person who does athletics
Who is an athlete?
200
The verb(s) for football
is to play.
For example: Her older brother enjoys playing football.
200
The verb(s) for basketball
It is to play? For example: Playing basketball needs a lot of practise.
200
The verb(s) for swimming
What is to swim/race? For example: Annie and her friends like swimming in the pool.
200
The verb(s) for sailing
What is to sail? For example: It's the perfect weather for sailing today.
200
The verb(s) for doing athletics
What is to run/jump/throw? For example: The athlete threw a javelin high up into the sky.
300
The place where they play football
It's a pitch or a stadium 
300
The place where they play basketball
It's a basketball court
300
The place where they swim
What is a pool?
300
The place where they sail
What is on the sea or a lake?
300
The place where they do athletics
What is a track (in a stadium)?
400
The equipment they have
What is a football?
400
The equipment they have
It is a basketball
400
The equipment they have
What is a swimming hat and goggles?
400
The equipment they have
What is a sailboat?
400
The equipment they have
Javelins, pole vaults, hurdles, etc.
500
The clothes they wear
It is a uniform?
500
The clothes they wear
What is a jersey and shorts?
500
The clothes they wear
What is a swimming costume?
500
The clothes they wear
What is a wetsuit?
500
The clothes they wear
What is a top and shorts?