(me) scientists studied the evolution of horses. they concluded that horses evolved with the emergence of grasslands and an increase of predators. the digits of their early eocene ancestor evolved into hooves. the diet changed from foliage to grasses. the molar teeth developed and became stronger. which statements are supported by this evidence?

Q says which statements ARE...so there are more than one:

The digits of the horses’ feet underwent modifications, enabling them to run faster from predators.

The emergence of grasslands over time led to the development of strong molar teeth in horses.

The digits of the horses’ feet underwent modifications, enabling them to run faster from predators.

The emergence of grasslands over time led to the development of strong molar teeth in horses.

Explanation:

The answer is "Sigmund Freud".

Sigmund Freud (1856 to 1939) was known as the founding father of psychoanalysis, a strategy for treating psychological instability and furthermore a hypothesis which clarifies human conduct. 
Freud trusted that occasions in our adolescence impact our grown-up lives, molding our identity. For instance, uneasiness starting from awful encounters in a man's past is escaped cognizance, and may cause issues during adulthood.