What is the correct term for changes in the elliptical shape of earth’s orbit every 100,000 years?

The correct term for changes in the elliptical shape of Earth’s orbit every 100,000 years can be described by - Milankovitch cycles

These cycle describe the effects of changes in the Earth's movements on its climate over thousands of years. There are three main factors of them: eccentricity, axial tilt, and precession.

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation: