Please answer What are the 2 reasons that the seasons
change?

a) Earth's tilt and rotation
b) Earth's tilt and revolution
c) Earth's rotation and revolution
d) Earth's tilt and resolution

The answer is b, can you explain why it’s the answer please

NO LINKS PLEASE!!

Asap timed! 1. ice core samples from glaciers ice caps contain bubbles of ancient atmosphere that are in layers based on age. what questions are scientists most interested in? a. how the amount of water vapor needed to make the ice has changed b. how the amount of ozone has changed over time.c. how the amount of ice in each layer has changed over time d. how the amount of carbon dioxide has changed over time 2. what produces milankovich cycles ? a. sunspots ams solar flare on the suns surface b. changes in the earths orbit c. gravitational changes bases on the position of the sun and the moond. cycles of vegetation that result in desert and rainforest conditions

New york city has 2,181 inhabitants per square mile. the state of alaska has 1.03 inhabitants per square mile. ecologists would say alaska has a low exponential growth population density birth rate carrying capacity

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?