how to read this call option

highlight/circle the call option that is at-the-money (or closest to being at-the-money)

AMZN (AMAZON.COM, INC.) Oct 16, 2020 @ 05:45 ET (Delayed) BID 3295 ASK 3355.82 Vol 2,524,921 LAST 3339.26978 CHANGE +4.35 (+0.13%) Filters by: Volume: All Expiration Type: All Options Range: Near the Money Expiration: 2021 June View Chain Total Records: 4 Options Chain Calls Last Net Bid Ask Vol IV Delta Gamma Int 504.45 -36.8 526.2 534.45 1 0.4581 0.8035 0.0003 93 490.18 -27.47 503.45 511.55 4 0.4577 0.5877 0.0003 644 491 -3.375 481.45 488.85 255 0.4571 0.5719 0.0003 555 467.94 -4.51 459.95 467.75 4 0.4564 0.5563 0.0003 360 06/18/2021 A Strike AMZN 3250.000 AMZN 3300.000 AMZN 3360.000 AMZN 3400.000 Puts Last Net Bid Ask Vol IV Delta Gamma int 447.16 44.135 426.6 432.6 265 0.4372 -0.3965 0.0003 244 452.1 +22.775 453.55 4508 12 0.4367 -0.415 0.0003 560 493 + 36.25 481.6 4878 9 0.4361 -0.4316 0.0003 119 514 +29.325 510.1 516.55 22 0.4355 -0.448 0.0003 156 Nov 2020 Dec 2020 Jan 2021 Feb 2021 Mar 2021 Apr 2021 Jun 2021 Jul 2021 Aug 2021 Sep 2021 Jan 2022 Jun 2022 Oct 2020 Jan 2023 Next