Acavern has is an underground chamber formed by a. deposition b. erosion c. evaporation d. runoff

The right answer is B. Erosion.

Several phenomena lead to the creation of caves. While granite or sandstone tafoni are formed by erosion of the rock, the lava tunnels are the result of an intense magmatic activity.

Tafoni designate a rounded cavity whose dimensions vary from decimetre to several meters of depth and diameter. These cavities are formed by the erosion of grainy magmatic rocks such as granite and sandstone sedimentary rocks.

the answer to your question is b

ans.

gregor john mendel is known for study of inheritance in pea plants. he used garden pea plant for his study, having alternative traits for various characters. he performed cross-breeding in pea plants to check how characters are transmitted between parents to offspring, such as cross between pure tall and pure dwarf plant. mendel studied the inheritance patterns in pea plants for various generations.

thus, the correct answer includes options and f).