(75) बाल मज़दूरी-समाज का कलंक संकेत-बिंदु : • अभिभावकों की गरीबी और अशिक्षा • शिक्षा के साधनों का अभाव • मुफ़्त एवं
अनिवार्य शिक्षा का उपाय​

What is the main difference between primary and secondary sources? a. primary sources are historical documents, and secondary sources are modern-day documents. b. primary sources are derived from museums and archives, and secondary sources are created by history students and academics. c. primary sources are found in ancient places with a rich history, and secondary sources are found in historical journals and blogs. d. primary sources are created during a particular historical era, and secondary sources are created by studying primary sources.