Milankovitch cycles select one:
a. refer to shifts in the temperature of surface water in the middle latitudes of the pacific ocean
b. are changes in earth's rotation and orbit around the sun that may trigger climate variation
c. describe the timing of the northern lights in the thermosphere
d. describe the transpiration, evaporation, and precipitation of earth's water
e. describe upwelling and downwelling in the ocean

The Milankovitch theory explains the long term climate change and the
Milankovitch cycles describe the effects of changes as a result of climate change. There are three Milankovitch cycles:about Earth's Eccentricity (the shape of the Earth's orbit around the Sun), Axial tilt (the inclination of the Earth's axis in relation to its plane of orbit around the Sun) and precession (the Earth's slow wobble as it spins on axis).
According to this, Milankovitch's cycles are changes in earth's rotation and orbit around the sun that may trigger climate variation. (B).

Is this a question? i'm confused