ANS:A - venting off (after burning) the excess inflammable/toxic gases at high pressure.

'Flare tower' used in industry is meant for venting off (after burning) the excess inflammable/toxic gases at high pressure. Flare towers are designed to safely burn off excess gases released during industrial processes, especially in situations where those gases cannot be easily captured or processed for reuse. This burning process helps prevent the release of harmful pollutants into the atmosphere.