Which phrase has the most positive connotation ? A mandatory task , an essential task , a compulsory task ?

Look at the following merriam-webster online dictionary entry for the word cleave: cleave verb \klev transitive verb 1. to divide by or as if by a cutting blow : split 2: to separate into distinct parts and especially into groups having divergent views 3: to subject to chemical cleavage, a protein cleaved by an enzyme intransitive verb 1: to adhere firmly and closely or loyally and unwaveringly which definition is most likely intended in the following sentence? the axe was made of a metal strong enough to cleave even the strongest marble. o a. transitive definition 3 o b. intransitive definition 1 o c. transitive definition 1 o d. transitive definition 2

Which of the following is a secondary source? o a biography of a playwright ob. historic photograph o c. antique weapon od. census data and statistics

The development of new inventions in the field of space travel seemed rapid. how does the word rapid function in a sentence?