Solar technologies generate a majority of the power used during space missions, keeping life support and other vital spacecraft systems working. Solar power is so critical that NASA spends considerable time and money to make solar panels must more efficient, lightweight and affordable.
A dependent Clause is a group of words, that have a subject and a verb, but cannot stand alone in a sentence. So, "<span>who had seen the tornado himself" seems most logical to me because they state subject and verb, and cannot stand alone.</span>
Last one: drivers using self-driving cars have reported multiple technology defects
In the classroom it is important for bilingual children to have both languages spoken in the class to for them to be comfortable. it gives them more of a welcoming environment and it makes everyone feel supported.
