2. Humans discovered how to use fire and tools. How was this knowledge passed along to younger generations? O Younger people were forced to spend long hours building fires and making tools. O Communication skills were developed so knowledge could be passed along to younger generations. The younger generations were able to figure out how to use tools on their own. O Primitive knowledge was instinctive so that the basic skills of fire and tools came naturally to everyone.

answer: wheres the options

explanation:

tsd is temerature dependent sex determination.

tsd: it is a type of environmental sex determination in which the temperature experienced during embryonic/ larval development (ambient temperature for development) determine the sex of the offspring.

crocodile displays the tsd where the ambient temperature of the developing egg determines the individual's sex. for example in the american alligator's eggs, incubation at 33 ºc produces mostly males, while incubation at 30 ºc produces mostly females. so if the american alligator's egg will get the ambient temperature (33 degree celcius)during embryonic development from egg, the offspring will be male and same for the female sex determination.

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.