General Science with Avengers

In the Marvel Cinematic Universe, the Tesseract is a physical object that houses the Space Stone, existing as a solid cube.

The term panther is commonly used to refer to leopards (specifically black leopards) or jaguars. Among the choices, leopard is the correct biological classification.

Mantis is an insect, and insects are characterized by having antennae. Arachnids have pedipalps but not antennae.

In the vacuum of space, temperatures approach absolute zero (-270°C). 0°C represents the standard freezing point of water, likely the intended answer despite space being much colder.

The melting point of ice is the temperature at which it transitions from solid to liquid, which is 0 degrees Celsius.

Rocket Raccoon is depicted as a mammal, characterized by having fur and being a vertebrate.

During photosynthesis, plants take in carbon dioxide and water to produce glucose and release oxygen as a byproduct.

Thanos's motivation in the Marvel films is based on the Malthusian theory that resources are finite and overpopulation leads to starvation and suffering.