1-
A.
,no color ,no smell,light and explode easily
2-
the methangas escape from seabed and rises
through water which becomes less dense .Then,ships sinks
3-
first ,methane gas rises through the air which becomes less dense.Then,planes drop and the navigathion equipment becomes useless.Aftar this planes explode
Concluding sentence:To sum up,In the recent years ,scientist reaches the Bermuda Triangle Mystery and they discover it`s secrets