Mercury, Earth, and Mars. Also Venus but that isn't an option.
Have a nice day :-)
I would say since 1996
Norway is currently storing 1 million tonnes of carbon dioxide each year since 1996 i guess for the safety
Alpha helices and Beta pleated sheets make up the secondary structure of protein.
Answer: Option B
Pigs wallow in the mud to cool themselves down.
Explanation: Pigs' skin contains lots of fats, and fats serves as thermal insulator during cold (low temperatures); unfortunately, this feature turns becomes a disadvantage during heat (high temperatures). Hence, pigs frequently wallows in the mud (or any nearby cool water place) - to reduce their body temperature.