Because they actually liked what they where doing so they decided to keep working on them.
Answer:
its should be it's
Explanation:
its means that something belongs to something, that it owns something, while it's means it is.
The Earth'sinterior is composed of four layers, three solid and one liquid—not magma but molten metal, nearly as hot as the surface of the sun. The deepest layer is a solid iron ball, about 1,500 miles (2,400 kilometers) in diameter. ... Above the inner core is the outer core, a shell of liquid iron.
Hi there! Well the word essential has a lot of synonyms. One of essential synonyms is important. So your answer is yes.
<span>b)Lightning bolts flash across the sky.
hope this helps</span>