How did some of the romans heat there homes? A. Central heating system
B. Stoves
C. Steam
D. Fireplaces

Some Roman homes were kept warm with an underfloor heating system called a 'hypocaust'. The floor was raised up by piles of tiles or stone pillars to allow warm air to circulate.

Explanation:

why was the national assembly formed by the third estate?

the estates-general had not been assembled since 1614, and its deputies drew up long lists of grievances and called for sweeping political and social reforms. the third estate, which had the most representatives, declared itself the national assembly and took an oath to force a new constitution on the king.

i believe the answer would be 1.