List as many examples of seasonal changes of plants and animals that you can.

spring trees bloom flowers

summer trees grow leaves

fall tree lose leaves

winter tree hibernate or something

spring squirrels come out of hibernating

summer squirrels gather food

fall squirrels still gather food and prepare to hibernate

winter squirrels hibernate

Explanation:

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

answer; both surfaces of the membrane are nonpermeable