Select the correct text in the passage.
which text in the passage suggests that it is a primary source?
it had been some years since the plague struck. life was getting back to normal. people were recovering from the trauma of losing their loved ones. they were learning to rebuild their lives. even so, the lords were finding it difficult to find laborers to work on their farms. they were paying a handsome price to anyone who knew the job well and was willing to work. even though i was a merchant, i was tempted to switch professions. however, i told myself it was a matter of time before my luck would change. there would be plenty of opportunities to earn good money by selling my wares. maybe moving to a new city would . cousin john had been suggesting a visit. his city would have opportunities for a cloth merchant.

homeostasis is the tendency towards a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes. and this is how it applies to the integumentary system. back to top. skin functions in homeostasis include protection, regulation of body temperature, sensory reception, water balance, synthesis of vitamins and hormones, and absorption of materials. when body temperature falls, the sweat glands constrict and sweat production decreases.

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.