Is referred to all expenses of raw and finished materials that are utilized in producing/making a product.
a. cost
b. price
c. profit
d. sales
9.
refers to financial gain that comes after the computation of the
difference between Cross sales and expenses.
a, cost
b. price
c, profit
d. sales
10.
refers to the sums of money or amount that are collected from
selling the product.
a. cost
b. price
c. profit
d. sales
food to stop and slow down the​

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.