Hot water rises and cold water [Select ] sinks
conducon
convection
radiation
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Stir frying vegetables
[Select)
A spoon in a cup of hot soup
becomes warmer
[Select]
Hot air balloon rises
[ Select
A raw egg begins to fry as it hits
a heated frying pan
Select)

1) Convection

2)Radiation

3)Conduction

4)Convection

5)Conduction

Explanation:

Convections is fluids such as air and water. Hot air rises , cold air goes down. Convection move in circular motion. Example: Your freezer should be at the bottom because hot air goes up where normal freezers and cold air goes down where the fridge is.  

Conduction is when you transfer heat through matter. Example: Hot tea transfers heat from hot tea to handle.

Radiation transfers heat through electromagnetics waves. Heat you can feel but not touch. Radiation doesn't require matter. Example: The sun you can feel the sun but not touch it.

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.