Use the drop-down menu to complete each statement.
one of einstein's major contributions to the study of physics was his theory of
(psychoanalysis, momentum, or relativity).
einstein's theories argued that the knowledge acquired through (instinct, the senses, or the psyche) was not always accurate.
in introducing his theories involving (relativity, physics, or, psychoanalysis), freud tried to explain human behavior and emotion.

- relativity

- senses

- psychoanalysis

Explanation:

Einstein´s theory of general relativity (1915) concluded that massive objects generate distortion in space-time, which is perceived as gravity.

This theory implies that knowledge acquired through our senses may be unreliable. For example, contrary to the idea of universal time, the time displayed by a clock depends on its trajectory as it travels through the universe.

Freud founded psychoanalysis as a therapy aimed to release repressed emotions, making the unconscious conscious.

the correct answer option is: weapons.

explanation:

tensions rose as the two opposing superpowers competed for 'weapons'.

referring to the cold war (1945-1991), the two superpowers, usa and ussr, experienced a phase of struggle and conflict with each other. these two superpowers considered each other as a threat to their survival and thus opted for policies to strengthen their positions.

the two superpowers never went to war with each other directly but competed for weapons to preserve their positions.