Aaj kal ke duniya me sharref ,acche and pyari dost milna mushkil hai me khud hairan hu tum logo ne mujhe dhund kaise liya

its for //=ritesh, nitin, shivi, tanishq, sarthu, etc etc kisika naam reh gaya toh bura mt mano plzz meko yaad bs itne hi hai

what is photosynthesis

Find the center and the radius of the circle with the equation: x^-2x+y^2+4y+1=0

May someone me answer these questions

Which sentence is punctuated correctly?  a.under a microscope; the organisms look a bit like ruffled tennis balls they have armored plates that fit together to make a round shape. b.when the water is disturbed; the organisms respond by glowing this makes swimmers look like floating beams of blue light. c.there is a bay in puerto rico that seems to light up at night; the light comes from tiny organisms in the water. d.the luminescence attracts visitors from around the world people are curious to see; this beautiful otherworldly sight.