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I would like to inform you that every apes given in the question is related to man but if we go for most appropriate or more related to man are Gorilla because Apes are the members of the hominoidea super-family of primates, which includes humans.

And according to the current classification system there are two families of hominoids. The family hominoidea consisting of orangutans, gorillas, chimpanzees, and humans, collectively known as the "great apes".

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Thanks.

Homo erectus (meaning 'upright man') were a species of archaic humans from the Pleistocene, earliest occurrence about 2 mya They are proposed to be the direct ancestors to several human species, such as H. heidelbergensis, H. antecessor, Neanderthals, Denisovans, and modern humans.

Modern man is nothing but homo sapiens so there are also theory stating that neanderthals are not the direct ancestor of homo sapiens but somewhat related to modern man.

Australopithecus anamensis, A. afarensis, and A. africanus are among the most famous of the extinct hominins. A. africanus was once considered to be ancestral to the genus Homo (in particular Homo erectus).

Fossil found is of idaltu man.

SO, the right answer would be homo erectus to be the director ancestor of homo sapiens.

The correct answer is Variation.

Explanation:

The various traits or behaviours of an organisms are seen to have evolved over many years through natural selection, with the main aim of surviving in the environment. Natural variation is the process in which individuals are better adapted in the environment, with the main aim of surviving and reproducing. Variations, often down the genetic level, or caused by genetic mutation, often allows some members of a species to be better adapted to an environment. This also helps in the process of evolution, thus initiating natural selection and initiating force of natural selection.

Hope it helps

Hello,

evolution of human is a long process.

Chimpanzees are considered as closest ancestors of humans.

The modern human is considered to have closest similarity with the species homosapien.

During ice age between 75,000-10,000 years ago modern Homo sapiens arose.

Hope you find this information helpful.

HELLO!!

Thermoregulation is energetically expensive for many organisms,specially for small animals like birds,shrews.we know that heat gain or heat loss is the function of surface area.Since these small animals have larger surface as compares to there volume they lose body heat very fast during  exposure to cold environment.To maintain their metabolism they have to expend much energy to keep their body warmer that much energy a small creature could not afford and thus they simply conform.

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Hello!!

Knowing the evolutionary relationships among species allows scientists to choose appropriate organisms for the study of diseases, such as HIV. Scientists are even using the principles of natural selection to identify new drugs for detecting and treating diseases such as cancer.