Which are nuclear reactions that produce energy by either splitting a nucleus or joining nuclei? A
fission and fusion
B
chemical and fusion
С.
electrical and mechanical
D
fission and electromagnetic

Simple harmonic motion wind energy circulation best answer from the choices

Year  1936,  lehman predicted that the earths 'inner core' is solid. she observed that the seismic signals during her study were bent and did not pass through instead bouncing back. later it was confirmed that the earth's inner core was solid made up of nickel-iron and had a molten outer core.

Lysosomes are considered  a digestive enzyme